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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#850679#9962. Diminishing FractionsZawosTL 1631ms110568kbC++232.5kb2025-01-10 11:06:152025-01-10 11:06:19

Judging History

你现在查看的是最新测评结果

  • [2025-01-10 11:06:19]
  • 评测
  • 测评结果:TL
  • 用时:1631ms
  • 内存:110568kb
  • [2025-01-10 11:06:15]
  • 提交

answer

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define FOR(i,a,b) for (int i = (a); i < (b); i++)
using namespace std;
using namespace __gnu_pbds;
using ll=long long;
using ld=long double;
using vi=vector<int>;
template<class T> using oset =tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update> ;
//上
const int N = 50001;
int wh[N];
int inv[5217][5217];
int euclid(int a, int b, int &x, int &y) {
	if (!b) return x = 1, y = 0, a;
	int d = euclid(b, a % b, y, x);
	return y -= a/b * x, d;
}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    memset(wh,-1,sizeof(wh));
    vector<int> prime(N+1,1);
    for(int i = 2; i <= N; i++){
        if(prime[i] == 1) for(int j = i; j <=N;j+=i) prime[j] = i;
    }

    vector<pair<int,int>> pot;

    for(int i = 2; i <= N;i++){
        unordered_map<int,int> fac;
        int x = i;
        int r = 1;
        while( x > 1){
            fac[prime[x]]++;
            r *= prime[x];
            x /= prime[x];
            
            if(fac.size() > 1) break;
        }
        if(fac.size() == 1){
            for(auto &u: fac) pot.push_back({u.first,r});
        }
    }
    for(int i = 0; i < 5217;i++) wh[pot[i].second] = i;
    int y;
    for(int i = 0; i < 5217;i++){
        for(int j = 0; j < 5217;j++){
            if(pot[i].first == pot[j].first) continue;
            euclid(pot[j].second,pot[i].second,inv[i][j],y);
            if(inv[i][j] <0) inv[i][j] += pot[i].second;
        }
    }
    int t;
    cin >>t;
    while(t--){
        int n;
        cin >> n;
        if(n == 1){
            cout <<"1/1\n";
            continue;
        }else if(n == 2){
            cout <<"1/2\n";
            continue;
        }
        unordered_map<int,int> mp;
        for(int i = 1; i <= n; i++){
            if(wh[i] != -1){
                mp[pot[wh[i]].first] = wh[i];
            }
        }
        double ans = 0.0;
        int co = 0;
        for(auto &u: mp){
            int a = 1;
            for(auto &e:mp){
                if(u.first == e.first) continue;
                a =a*inv[u.second][e.second]%pot[u.second].second;
            }
            if(co > 0)cout<<'+';
            cout<<a<<"/"<<pot[u.second].second;
            co++;
            ans += (double)a/(double)pot[u.second].second;
        }
        ans += 0.5;
        cout<<"-"<<floor(ans)<<"/1\n";
    }
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 1294ms
memory: 110344kb

input:

2
3
6

output:

2/3+1/2-1/1
3/5+2/3+3/4-2/1

result:

ok OK, t = 2

Test #2:

score: 0
Accepted
time: 1286ms
memory: 110172kb

input:

1
1

output:

1/1

result:

ok OK, t = 1

Test #3:

score: 0
Accepted
time: 1278ms
memory: 110396kb

input:

10
1
2
3
4
5
6
7
8
9
10

output:

1/1
1/2
2/3+1/2-1/1
1/3+3/4-1/1
3/5+2/3+3/4-2/1
3/5+2/3+3/4-2/1
2/7+4/5+2/3+1/4-2/1
1/7+2/5+1/3+1/8-1/1
5/7+4/5+1/9+3/8-2/1
5/7+4/5+1/9+3/8-2/1

result:

ok OK, t = 10

Test #4:

score: 0
Accepted
time: 1293ms
memory: 110492kb

input:

54
7
20
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
3
47
81

output:

2/7+4/5+2/3+1/4-2/1
15/19+12/17+4/13+9/11+2/7+3/5+5/9+15/16-5/1
1/2
2/3+1/2-1/1
1/3+3/4-1/1
3/5+2/3+3/4-2/1
3/5+2/3+3/4-2/1
2/7+4/5+2/3+1/4-2/1
1/7+2/5+1/3+1/8-1/1
5/7+4/5+1/9+3/8-2/1
5/7+4/5+1/9+3/8-2/1
1/11+3/7+4/5+5/9+1/8-2/1
1/11+3/7+4/5+5/9+1/8-2/1
10/13+6/11+4/7+3/5+8/9+5/8-4/1
10/13+6/11+4/7+...

result:

ok OK, t = 54

Test #5:

score: 0
Accepted
time: 1305ms
memory: 110472kb

input:

92
51
54
57
60
63
66
69
72
75
78
81
84
87
90
93
96
99
102
105
108
111
114
117
120
123
126
129
132
135
138
141
144
147
150
153
156
159
162
165
168
171
174
177
180
183
186
189
192
195
198
201
204
207
210
213
216
219
222
225
228
231
234
237
240
243
246
249
252
255
258
261
264
267
270
273
276
279
282
28...

output:

21/47+30/43+26/41+2/27+24/29+21/25+27/32+18/31+26/49+10/11+21/37+2/13+11/17+8/19+19/23-9/1
11/53+27/47+3/43+9/41+25/27+1/29+7/25+15/32+29/31+31/49+6/11+36/37+2/13+14/17+17/19+6/23-8/1
11/53+27/47+3/43+9/41+25/27+1/29+7/25+15/32+29/31+31/49+6/11+36/37+2/13+14/17+17/19+6/23-8/1
45/59+46/53+14/47+19/43...

result:

ok OK, t = 92

Test #6:

score: 0
Accepted
time: 1364ms
memory: 110568kb

input:

1000
622
149
839
472
292
345
799
941
449
15
907
494
48
430
505
66
83
97
10
548
286
644
528
249
573
860
557
932
746
262
971
157
603
715
984
333
53
916
784
649
70
768
780
64
118
616
979
466
24
2
517
774
566
419
182
222
40
169
951
830
977
383
355
770
134
973
917
3
854
31
35
825
109
945
671
536
952
888
...

output:

429/619+398/599+545/593+425/577+260/563+496/557+508/541+448/509+179/503+340/499+156/491+454/479+2/467+148/463+389/461+8/457+372/449+37/443+163/439+159/431+379/419+334/409+149/401+371/397+166/389+278/379+257/373+49/613+29/359+63/607+257/353+282/349+69/601+212/347+141/331+20/571+303/317+209/311+156/54...

result:

ok OK, t = 1000

Test #7:

score: 0
Accepted
time: 1631ms
memory: 110404kb

input:

1000
1748
1741
1576
1940
1648
1825
1183
1447
1318
1277
1913
1208
1417
1388
1143
1581
1222
1904
1407
1006
1175
1218
1734
1934
1003
1704
1984
1399
1333
1840
1317
1233
1133
1232
1776
1881
1476
1712
1401
1231
1978
1964
1419
1644
1103
1498
1454
1480
1377
1352
1837
1616
1009
1413
1199
1977
1477
1579
1920
...

output:

493/1747+226/1733+774/1721+302/1709+1534/1697+952/1693+1511/1667+346/1663+1063/1657+884/1637+739/1627+518/709+190/1223+268/691+298/683+190/677+91/163+237/661+419/653+77/139+788/1723+611/641+92/127+516/631+177/619+354/599+504/593+20/79+450/1621+561/577+220/1091+198/563+408/557+21/43+354/541+309/509+3...

result:

ok OK, t = 1000

Test #8:

score: -100
Time Limit Exceeded

input:

1000
2107
2115
2985
2832
2564
2529
2971
2637
2666
2172
2496
2191
2465
2199
2260
2161
2402
2369
2762
2674
2734
2252
2488
2185
2652
2014
2018
2960
2313
2063
2696
2976
2457
2247
2180
2647
2907
2901
2912
2538
2512
2623
2267
2986
2348
2170
2131
2166
2563
2111
2860
2254
2462
2080
2054
2803
2397
2778
2411
...

output:

1387/2099+1830/2089+1367/2087+1852/2083+1980/2081+1368/2069+12/2063+698/2039+554/2027+257/2017+243/2003+577/1999+1183/1997+1770/1987+1942/1979+461/1973+1151/1951+644/1949+924/1933+1419/1931+463/1913+1672/1907+904/1901+1800/1889+1341/1877+903/1873+730/1871+1729/1867+985/1861+1063/1847+1586/1831+245/1...

result: