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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#139697 | #6395. Equation Discovering | Schi2oid | WA | 230ms | 3908kb | C++14 | 2.7kb | 2023-08-14 10:40:14 | 2023-08-14 10:40:18 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
int n;
int val[6];
long double x[25],y[25];
int ls[25],rs[25],typ[25];
int mi[25];
int idcnt=1;
mt19937 ra(time(0));
long double f(long double x,long double y,int typ){
if(typ==0) return x+y;
else if(typ==1) return x-y;
else if(typ==2) return x*y;
else if(typ==3){
if(abs(y)<=1e-3) return ra();
return x/y;
}
else if(typ==4) return sin(x);
else return cos(x);
}
void prt(int p){
printf("(");
if(p==-1) printf("x");
else if(typ[p]==0){
prt(ls[p]);printf("+");prt(rs[p]);
}
else if(typ[p]==1){
prt(ls[p]);printf("-");prt(rs[p]);
}
else if(typ[p]==2){
prt(ls[p]);printf("*");prt(rs[p]);
}
else if(typ[p]==3){
prt(ls[p]);printf("/");prt(rs[p]);
}
else if(typ[p]==4){
printf("sin(");prt(ls[p]);printf(")");
}
else if(typ[p]==5){
printf("cos(");prt(ls[p]);printf(")");
}
printf(")");
}
long double calc(int p,long double x){
long double lc=x,rc=x;
if(ls[p]!=-1) lc=calc(ls[p],x);
if(rs[p]!=-1) rc=calc(rs[p],x);
return f(lc,rc,typ[p]);
}
void check(){
for(int i=1;i<=n;i++) if(abs(calc(1,x[i])-y[i])/max((long double)1,abs(y[i]))>1e-3) return;
prt(1);
exit(0);
}
void dfs(int lim,vector<int>vec){
int tmp[25];
check();
int cnt=0;
for(int i=0;i<vec.size();i++) cnt+=val[typ[vec[i]]];
for(int i=1;i<=cnt;i++) tmp[i]=-1;
vector<int>nxt;
int befcnt=idcnt;
for(int i=1;i<mi[cnt];i++){
for(int j=1;j<=cnt;j++){
tmp[j]++;
if(tmp[j]==6) tmp[j]=-1;
else break;
}
int nxtcnt=0;
for(int i=1;i<=cnt;i++) if(tmp[i]!=-1) nxtcnt+=val[tmp[i]];
if(nxtcnt>lim) continue;
int poi=cnt;
for(int j=0;j<vec.size();j++){
if(typ[vec[j]]<=3){
if(tmp[poi]!=-1){
ls[vec[j]]=++idcnt;
typ[idcnt]=tmp[poi--];
nxt.push_back(idcnt);
}
else{
ls[vec[j]]=-1;
poi--;
}
if(tmp[poi]!=-1){
rs[vec[j]]=++idcnt;
typ[idcnt]=tmp[poi--];
nxt.push_back(idcnt);
}
else{
rs[vec[j]]=-1;
poi--;
}
}
else{
if(tmp[poi]!=-1){
ls[vec[j]]=++idcnt;
typ[idcnt]=tmp[poi--];
nxt.push_back(idcnt);
}
else{
ls[vec[j]]=-1;
poi--;
}
rs[vec[j]]=-1;
}
}
dfs(lim-nxtcnt,nxt);
nxt.clear();
idcnt=befcnt;
}
for(int i=0;i<vec.size();i++) ls[vec[i]]=rs[vec[i]]=-1;
}
int main(){
mi[0]=1;
for(int i=1;i<=9;i++) mi[i]=mi[i-1]*7;
val[0]=val[1]=val[2]=val[3]=2;
val[4]=val[5]=1;
for(int i=1;i<=20;i++) ls[i]=-1,rs[i]=-1;
cin>>n;
for(int i=1;i<=n;i++){
scanf("%Lf%Lf",&x[i],&y[i]);
assert(abs(x[i])>1e-4);
}
vector<int>vec;
vec.push_back(1);
for(int i=0;i<6;i++){
typ[1]=i;
ls[1]=-1,rs[1]=-1;
dfs(9-val[i],vec);
}
puts("-1");
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 1ms
memory: 3784kb
input:
3 1.000000 1.000000 2.000000 4.000000 3.000000 9.000000
output:
((x)+(((x)*(x))-(x)))
result:
ok great!!
Test #2:
score: 0
Accepted
time: 3ms
memory: 3896kb
input:
3 0.618000 1.517072 0.314000 3.132637 1.414000 0.494016
output:
((x)+((((sin((x)))/(x))/(x))-(x)))
result:
ok great!!
Test #3:
score: 0
Accepted
time: 0ms
memory: 3848kb
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: 3ms
memory: 3844kb
input:
5 25.032427 -0.100652 38.727324 1.658518 27.684334 -0.669555 64.282391 8.275303 52.640700 -0.962660
output:
((x)+(((sin((x)))/(cos((x))))-(x)))
result:
ok great!!
Test #5:
score: 0
Accepted
time: 18ms
memory: 3908kb
input:
5 78.611917 -0.992212 -29.857271 1.011993 -75.513655 1.006611 68.512394 1.145128 7.961096 0.881661
output:
(((sin((x)))*(sin((x))))+(cos((x))))
result:
ok great!!
Test #6:
score: 0
Accepted
time: 3ms
memory: 3848kb
input:
5 -78.733375 0.503570 -20.187183 0.735779 -38.984992 0.730890 47.859232 0.622831 -19.657164 0.641512
output:
((x)+((sin((sin((cos((cos((x)))))))))-(x)))
result:
ok great!!
Test #7:
score: 0
Accepted
time: 1ms
memory: 3832kb
input:
5 3.241091 -32.628130 -83.514144 86.463432 33.586619 40.691607 41.123543 -147.352644 26.896326 27.404018
output:
((x)+(((x)/(sin((x))))-(x)))
result:
ok great!!
Test #8:
score: 0
Accepted
time: 213ms
memory: 3908kb
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: 146ms
memory: 3800kb
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: 1ms
memory: 3776kb
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)+((x)+((sin((x)))-(x))))
result:
ok great!!
Test #11:
score: 0
Accepted
time: 2ms
memory: 3784kb
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)+((x)-((x)+(sin((x))))))
result:
ok great!!
Test #12:
score: 0
Accepted
time: 95ms
memory: 3784kb
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: 2ms
memory: 3784kb
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)-((x)+(x))))
result:
ok great!!
Test #14:
score: 0
Accepted
time: 1ms
memory: 3788kb
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)-((x)+(x)))))
result:
ok great!!
Test #15:
score: 0
Accepted
time: 186ms
memory: 3732kb
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((((x)/(x))+(sin((x))))))
result:
ok great!!
Test #16:
score: 0
Accepted
time: 32ms
memory: 3796kb
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((sin((cos(((x)/(x))))))))+(sin((cos((x))))))
result:
ok great!!
Test #17:
score: 0
Accepted
time: 209ms
memory: 3796kb
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: -100
Wrong Answer
time: 230ms
memory: 3848kb
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)+((x)/(x)))))))))
result:
wrong answer div a small number