QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#242678 | #6395. Equation Discovering | ucup-team902 | AC ✓ | 75ms | 148228kb | C++17 | 1.5kb | 2023-11-07 16:18:56 | 2023-11-07 16:18:56 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define db double
#define mp make_pair
#define ep emplace_back
valarray<db> x_arr;
valarray<db> y_arr;
vector<pair<string, valarray<db>>> expr[10];
inline bool check(valarray<db> &arr){
for(int i = 0; i < x_arr.size(); ++i) if(abs(arr[i] - y_arr[i]) > max(abs(y_arr[i]), 1.0) * 1e-3) return 0;
return 1;
}
int main(){
int n; cin >> n;
x_arr.resize(n);
y_arr.resize(n);
for(int i = 0; i < n; ++i){
cin >> x_arr[i] >> y_arr[i];
}
expr[0].ep(mp("x", x_arr));
for(int i = 1; i <= 9; ++i){
for(auto &[f, y]: expr[i - 1]){
expr[i].ep(mp("sin(" + f + ")", sin(y)));
expr[i].ep(mp("cos(" + f + ")", cos(y)));
}
for(int j = 0; j < i - 1; ++j){
for(auto &[f1, y1] : expr[j]){
for(auto &[f2, y2] : expr[i - j - 2]){
expr[i].ep(mp("(" + f1 + "+" + f2 + ")", y1 + y2));
expr[i].ep(mp("(" + f1 + "-" + f2 + ")", y1 - y2));
expr[i].ep(mp("(" + f1 + "*" + f2 + ")", y1 * y2));
if(abs(y2).min() >= 0.01){
expr[i].ep(mp("(" + f1 + "/" + f2 + ")", y1 / y2));
}
}
}
}
for(auto &[f, y]: expr[i]){
if(check(y)){
printf("%s\n", f.c_str());
return 0;
}
}
}
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 4312kb
input:
3 1.000000 1.000000 2.000000 4.000000 3.000000 9.000000
output:
(x*x)
result:
ok great!!
Test #2:
score: 0
Accepted
time: 1ms
memory: 4440kb
input:
3 0.618000 1.517072 0.314000 3.132637 1.414000 0.494016
output:
(sin(x)/(x*x))
result:
ok great!!
Test #3:
score: 0
Accepted
time: 0ms
memory: 4368kb
input:
5 77.685777 233.057331 -66.445083 -199.335249 79.966717 239.900151 84.982130 254.946390 -31.528900 -94.586700
output:
(x+(x+x))
result:
ok great!!
Test #4:
score: 0
Accepted
time: 0ms
memory: 4292kb
input:
5 25.032427 -0.100652 38.727324 1.658518 27.684334 -0.669555 64.282391 8.275303 52.640700 -0.962660
output:
(sin(x)/cos(x))
result:
ok great!!
Test #5:
score: 0
Accepted
time: 3ms
memory: 6748kb
input:
5 78.611917 -0.992212 -29.857271 1.011993 -75.513655 1.006611 68.512394 1.145128 7.961096 0.881661
output:
(cos(x)+(sin(x)*sin(x)))
result:
ok great!!
Test #6:
score: 0
Accepted
time: 0ms
memory: 4436kb
input:
5 -78.733375 0.503570 -20.187183 0.735779 -38.984992 0.730890 47.859232 0.622831 -19.657164 0.641512
output:
sin(sin(cos(cos(x))))
result:
ok great!!
Test #7:
score: 0
Accepted
time: 0ms
memory: 4392kb
input:
5 3.241091 -32.628130 -83.514144 86.463432 33.586619 40.691607 41.123543 -147.352644 26.896326 27.404018
output:
(x/sin(x))
result:
ok great!!
Test #8:
score: 0
Accepted
time: 66ms
memory: 146312kb
input:
20 -4.908422 -0.693287 3.569189 0.328182 1.946572 -0.667466 6.515336 -0.829948 -1.394076 0.752980 6.722989 0.831881 1.241795 0.835231 -2.443177 -0.143098 -4.180762 -0.803482 1.511247 0.589509 0.627755 0.554244 -1.865604 -0.470029 -4.756347 -0.656984 1.850611 -0.426016 6.580133 -0.474416 6.861815 -0....
output:
sin(sin((x/sin((x/(x*x))))))
result:
ok great!!
Test #9:
score: 0
Accepted
time: 13ms
memory: 31188kb
input:
20 76.797930 0.000002 -76.263778 -0.000002 55.449039 0.000006 10.462093 0.000873 -78.051671 -0.000002 -52.781249 -0.000007 47.053973 0.000010 96.629212 0.000001 -40.697847 -0.000015 31.141805 0.000033 -87.087384 -0.000002 -54.709885 -0.000006 -65.741847 -0.000004 -87.430820 -0.000001 9.420126 0.0011...
output:
(x/(x*(x*(x*x))))
result:
ok great!!
Test #10:
score: 0
Accepted
time: 0ms
memory: 3992kb
input:
20 24.490647 23.891773 17.327799 16.329001 21.204241 21.912414 83.489542 84.461510 -55.546573 -54.703972 -7.608368 -8.578356 -3.286697 -3.142101 -66.606831 -66.014954 -44.896454 -45.688502 97.541741 97.389961 -59.986043 -59.694554 57.723989 58.646803 -99.857351 -99.233536 29.134673 28.376609 -98.668...
output:
(x+sin(x))
result:
ok great!!
Test #11:
score: 0
Accepted
time: 1ms
memory: 3992kb
input:
20 89.594917 88.596688 -45.187625 -44.253669 97.451471 97.513530 35.078537 35.576300 82.504351 81.771201 -49.755211 -50.243625 -23.019693 -23.876242 -45.247155 -44.293590 75.324114 75.398156 78.533049 78.526282 99.112156 100.100628 31.983437 31.445903 71.251578 70.407388 -44.178279 -43.983549 -25.28...
output:
(x-sin(x))
result:
ok great!!
Test #12:
score: 0
Accepted
time: 1ms
memory: 4880kb
input:
20 16.664144 7.850741 44.708237 22.196248 -10.852343 1.533223 -42.713221 -12.119419 -27.815914 -11.038511 31.908696 13.299065 -82.394044 40.761558 -37.317157 -12.907073 -35.369997 17.659068 93.569121 -45.722539 -30.589159 -15.242258 16.180069 6.553209 56.572831 1.366451 99.591187 -47.440823 12.73229...
output:
(x*(sin(x)*cos(x)))
result:
ok great!!
Test #13:
score: 0
Accepted
time: 0ms
memory: 4028kb
input:
20 -583.519562 0.000000 -169.653469 0.000000 372.798856 0.000000 180.084282 0.000000 139.388742 0.000000 -648.300263 0.000000 -859.523046 0.000000 -267.278551 0.000000 635.554372 0.000000 299.925737 0.000000 -628.299469 0.000000 169.393099 0.000000 556.144161 0.000000 -881.876627 0.000000 328.692044...
output:
(x-x)
result:
ok great!!
Test #14:
score: 0
Accepted
time: 0ms
memory: 4056kb
input:
20 746.491049 746.491049 414.031997 414.031997 -975.051138 -975.051138 45.313068 45.313068 -181.090458 -181.090458 119.607074 119.607074 245.794647 245.794647 -794.156219 -794.156219 461.647608 461.647608 -392.604379 -392.604379 384.522118 384.522118 -461.749513 -461.749513 766.462890 766.462890 244...
output:
(x+(x-x))
result:
ok great!!
Test #15:
score: 0
Accepted
time: 1ms
memory: 4876kb
input:
20 4.278335 0.092599 3.559350 0.559919 -2.517239 0.403581 -0.955317 0.182475 3.048015 0.888213 -0.638367 0.393205 -2.188885 0.183959 -0.367275 0.597938 1.106453 0.948186 0.339096 0.971773 -0.678258 0.364003 4.364111 0.060002 -0.671364 0.369012 -2.777257 0.600136 1.617698 0.909755 -3.400784 0.950952 ...
output:
sin((sin(x)+(x/x)))
result:
ok great!!
Test #16:
score: 0
Accepted
time: 59ms
memory: 131984kb
input:
20 3.692126 -0.260752 0.663419 1.200876 1.167172 0.874743 4.852602 0.631308 3.373109 -0.334749 4.749943 0.529545 -2.549440 -0.245748 -1.158832 0.881804 4.115764 -0.040747 -3.401216 -0.330886 -4.320685 0.119451 -0.070540 1.332133 -4.666465 0.446117 -4.720184 0.499803 -1.731319 0.332854 4.232513 0.046...
output:
(sin(cos(x))+sin(sin(cos((x/x)))))
result:
ok great!!
Test #17:
score: 0
Accepted
time: 59ms
memory: 147440kb
input:
20 1.462467 0.804429 -2.922001 0.192241 4.580542 -0.620639 -0.475001 -0.799291 -1.988595 -0.234001 1.262913 0.840075 -3.176510 -0.034797 2.030387 0.180297 -3.244547 -0.099928 -3.321420 -0.164361 -0.538138 -0.818609 2.485817 -0.209990 -0.282936 -0.652106 0.964792 0.840607 -1.300754 -0.837872 4.323400...
output:
sin(sin((sin(x)+sin(sin((x+x))))))
result:
ok great!!
Test #18:
score: 0
Accepted
time: 4ms
memory: 21380kb
input:
20 -1.290592 0.818752 0.639318 0.516086 -4.576452 0.791075 2.349231 0.829843 3.053369 0.646833 -4.276424 0.836563 -4.295090 0.835111 1.704429 0.790551 1.694925 0.788364 0.763954 0.527671 -0.477936 0.769603 0.395468 0.525360 0.686854 0.519231 -1.940048 0.637497 2.188388 0.840879 1.028990 0.584344 3.9...
output:
sin(cos(sin((x+cos((x-x))))))
result:
ok great!!
Test #19:
score: 0
Accepted
time: 0ms
memory: 4080kb
input:
20 -0.425664 0.425664 5.789130 -5.789130 -3.787451 3.787451 0.301151 -0.301151 -8.592688 8.592688 2.669073 -2.669073 5.308311 -5.308311 -0.139985 0.139985 -5.857648 5.857648 -4.992568 4.992568 6.105319 -6.105319 -3.765244 3.765244 5.912188 -5.912188 -6.224392 6.224392 -0.543340 0.543340 3.434037 -3....
output:
(x-(x+x))
result:
ok great!!
Test #20:
score: 0
Accepted
time: 1ms
memory: 4584kb
input:
20 466.316736 -0.978078 -899.828376 0.971830 493.698428 0.451443 543.034476 -0.444891 547.435563 -0.716269 -477.216617 -0.300738 397.144177 -0.964489 -215.994986 0.699650 -125.191685 -0.454687 -278.649888 0.814495 958.350526 0.164022 -505.445050 0.344182 -930.587439 0.625688 397.543136 -0.991345 -25...
output:
sin((x-(x+x)))
result:
ok great!!
Test #21:
score: 0
Accepted
time: 0ms
memory: 7448kb
input:
20 999.999999 0.987127 -999.999999 0.987127 100.000001 -0.333949 -100.000001 -0.333949 999.999998 -0.829877 -999.999998 -0.829877 512.000001 -0.871928 -512.000001 -0.871928 511.999999 -0.985382 -511.999999 -0.985382 0.000000 0.000000 0.000001 0.000000 -0.000001 0.000000 0.180000 0.001050 -0.180000 0...
output:
sin((x*(x*(x*x))))
result:
ok great!!
Test #22:
score: 0
Accepted
time: 36ms
memory: 94800kb
input:
20 0.009999 0.914653 0.009999 0.914653 0.009999 0.914653 0.009999 0.914653 0.009999 0.914653 0.009999 0.914653 0.009999 0.914653 1.000000 0.914653 1.000000 0.914653 2.005000 0.914653 2.005000 0.914653 3.000000 0.914653 3.000000 0.914653 0.009999 0.914653 0.009999 0.914653 0.009999 0.914653 0.009999 ...
output:
cos(cos(((cos(x)+cos(x))/cos(x))))
result:
ok great!!
Test #23:
score: 0
Accepted
time: 0ms
memory: 4292kb
input:
1 31.424306 31.456129
output:
(x+sin(x))
result:
ok great!!
Test #24:
score: 0
Accepted
time: 0ms
memory: 4832kb
input:
20 -29.440025 807.835022 19.414601 415.755934 11.492851 155.071326 18.966989 397.680650 3.027310 15.219226 -4.525550 11.429503 -7.906286 46.696786 -21.105731 403.240419 16.717653 312.915228 25.349563 693.299470 28.071737 844.165892 28.141608 848.233317 -26.371446 642.710272 -13.802857 162.913147 -23...
output:
(x+(x+(x*x)))
result:
ok great!!
Test #25:
score: 0
Accepted
time: 0ms
memory: 4556kb
input:
20 458.594270 0.909297 236.772098 0.909297 679.844094 0.909297 -113.768271 0.909297 -919.765157 0.909297 450.713950 0.909297 -560.756795 0.909297 35.253093 0.909297 -530.329136 0.909297 -846.165765 0.909297 -294.618124 0.909297 595.795664 0.909297 441.685140 0.909297 220.854674 0.909297 -649.606144 ...
output:
sin(((x+x)/x))
result:
ok great!!
Test #26:
score: 0
Accepted
time: 0ms
memory: 4032kb
input:
4 0.009999 1.000000 1.000000 1.000000 2.000000 1.000000 3.000000 1.000000
output:
cos((x-x))
result:
ok great!!
Test #27:
score: 0
Accepted
time: 45ms
memory: 78204kb
input:
4 1.560797 17.311340 1.000000 0.616661 2.000000 -0.369041 3.000000 -0.166678
output:
(cos(sin(x))/(cos(x)*(x+x)))
result:
ok great!!
Test #28:
score: 0
Accepted
time: 58ms
memory: 81212kb
input:
4 0.020000 0.712709 1.000000 0.577284 2.000000 0.964383 3.000000 0.786224
output:
cos(sin((x+cos(sin(cos((x/x)))))))
result:
ok great!!
Test #29:
score: 0
Accepted
time: 1ms
memory: 4616kb
input:
1 10.000000 9.990000
output:
(x*cos((sin(x)/x)))
result:
ok great!!
Test #30:
score: 0
Accepted
time: 14ms
memory: 18732kb
input:
2 0.026592 0.026593 4.000000 260.000000
output:
(x+(x*(x*(x*x))))
result:
ok great!!
Test #31:
score: 0
Accepted
time: 67ms
memory: 134644kb
input:
20 -816.944077 0.750063 364.252903 0.749797 377.702803 0.739860 -64.648254 0.723984 960.420578 0.734135 876.304536 0.749578 -718.016803 0.722938 -720.680010 0.725173 669.591341 0.746462 -835.716345 0.750360 611.456898 0.727346 -401.888640 0.749253 -59.913119 0.749372 -421.048989 0.750298 495.542911 ...
output:
cos(cos(cos(cos(cos(cos(cos(cos(cos(x)))))))))
result:
ok great!!
Test #32:
score: 0
Accepted
time: 60ms
memory: 148228kb
input:
20 -966.243761 0.499984 -775.541582 -0.343886 665.144672 -0.467363 -440.569467 -0.446768 -15.642683 -0.064867 -891.727356 0.368493 -428.695562 -0.501273 -944.141182 -0.501731 265.202915 0.498506 -979.532068 0.423344 -678.301273 0.253567 125.728556 0.064444 -465.052762 -0.095704 -183.526425 -0.498649...
output:
sin(sin(sin(sin(sin(sin(sin(sin(sin(x)))))))))
result:
ok great!!
Test #33:
score: 0
Accepted
time: 70ms
memory: 146884kb
input:
20 167.504612 669.176868 -132.494106 -530.496735 223.716049 894.248735 -14.542026 -59.087262 83.792869 336.028843 46.267758 185.826345 90.986202 364.064505 243.671799 973.706807 176.221425 705.173795 -140.883003 -564.001461 -25.914422 -104.362161 83.745358 335.862277 -92.043462 -367.367900 16.845939...
output:
(x+(x+(x+(x+sin(x)))))
result:
ok great!!
Test #34:
score: 0
Accepted
time: 61ms
memory: 137692kb
input:
20 5.820261 -23.727611 89.024912 -355.227137 78.465702 -313.788761 189.581597 -757.441601 -26.277637 104.199881 -58.876286 234.778122 180.037331 -720.972254 57.254054 -228.367888 -180.418016 722.647178 61.635602 -247.473082 126.339101 -504.731198 -192.871864 772.431509 -69.108582 276.440784 20.47183...
output:
(sin(x)-(x+(x+(x+x))))
result:
ok great!!
Test #35:
score: 0
Accepted
time: 75ms
memory: 146284kb
input:
20 -4.724302 498.103725 -3.940617 172.814337 -2.254073 -20.019734 2.417435 22.626021 4.576524 -434.632501 -3.789730 124.524863 -0.923911 -0.581439 -2.730462 -22.213656 -1.227515 -2.137958 -2.004088 -14.640510 -1.374969 -3.505828 -4.749463 508.486587 -0.919612 -0.568834 -1.895851 -12.242133 2.276076 ...
output:
(x*(x*(x*(x*sin(x)))))
result:
ok great!!
Test #36:
score: 0
Accepted
time: 60ms
memory: 146648kb
input:
20 -1.862076 -0.079675 4.978934 -0.001570 -1.706248 -0.116906 3.159038 -0.000175 -2.164361 -0.037776 4.298608 -0.002682 3.437089 -0.002087 0.898312 1.201300 -0.915297 -1.129496 4.614390 -0.002195 0.547090 5.806825 -1.238625 -0.401631 -3.916926 0.002974 -0.651893 -3.359412 -0.913229 -1.137947 -3.8357...
output:
(sin(x)/(x*(x*(x*x))))
result:
ok great!!
Test #37:
score: 0
Accepted
time: 3ms
memory: 7460kb
input:
20 999.999999 0.987127 -999.999999 0.987127 100.000001 -0.333949 -100.000001 -0.333949 999.999998 -0.829877 -999.999998 -0.829877 512.000001 -0.871928 -512.000001 -0.871928 511.999999 -0.985382 -511.999999 -0.985382 754.901184 0.143249 0.000001 0.000000 -0.000001 0.000000 0.180000 0.001050 -0.180000...
output:
sin((x*(x*(x*x))))
result:
ok great!!