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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#575796 | #8150. XOR Sum | zxzxzxq | AC ✓ | 22ms | 8884kb | C++14 | 1.7kb | 2024-09-19 16:49:43 | 2024-09-19 16:49:51 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define int long long
const int maxn = 110;
const int mod = 1e9 + 7;
int jc[maxn],upm[maxn],ans;
int f[maxn][350][20];
int C[maxn][maxn];
int powe(int a, int b) {
int base = 1;
while(b) {
if(b & 1) base = base * a % mod;
a = a * a % mod;
b >>= 1;
}
return base;
}
int cc(int n, int m) {
// return C[n][m];
return jc[n] * powe(jc[m], mod - 2) % mod * powe(jc[n - m], mod - 2) % mod;
}
int c(int n, int m) {
return C[n][m];
// return jc[n] * powe(jc[m], mod - 2) % mod * powe(jc[n - m], mod - 2) % mod;
}
signed main() {
// freopen("data.in", "r", stdin);
int n, m, k;
cin >> n >> m >> k;
f[61][0][k]=1;
jc[0]=1;
for(int i=1;i<=20;i++) jc[i]=jc[i-1]*i%mod;
for(int i=0;i<=k;i++)
for(int j=0;j<=i;j++)
C[i][j]=cc(i,j);
for(int i=60;i>=0;i--)
{
int now=1ll<<i;
int lk=(n&now)!=0;
for(int j=0;j<=k*k/2;j++)
for(int w=0;w<=k;w++)
for(int a=0;a<=k-w;a++)
{
if(now&m)
{
for(int b=0;b<=w;b++)
{
int nowj=j*2+lk-(k-a-b)*(a+b);
if(nowj<0) continue;
f[i][nowj][b]=(f[i][nowj][b]+f[i+1][j][w]*c(k-w,a)%mod*c(w,b))%mod;
}
}
else
{
int nowj=j*2+lk-(k-a)*a;
if(nowj<0) continue;
f[i][nowj][w]=(f[i][nowj][w]+f[i+1][j][w]*c(k-w,a))%mod;
// if(i==60)cout<<f[i][nowj][w]<<'\n';
}
}
}
for(int i=0;i<=k;i++) ans+=f[0][0][i];
cout<<ans%mod<<'\n';
return 0;
}
这程序好像有点Bug,我给组数据试试?
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 5844kb
input:
6 2 3
output:
12
result:
ok 1 number(s): "12"
Test #2:
score: 0
Accepted
time: 1ms
memory: 6156kb
input:
30 6 5
output:
1520
result:
ok 1 number(s): "1520"
Test #3:
score: 0
Accepted
time: 1ms
memory: 5888kb
input:
0 0 1
output:
1
result:
ok 1 number(s): "1"
Test #4:
score: 0
Accepted
time: 1ms
memory: 5920kb
input:
0 0 2
output:
1
result:
ok 1 number(s): "1"
Test #5:
score: 0
Accepted
time: 1ms
memory: 6008kb
input:
0 1145141919 2
output:
145141913
result:
ok 1 number(s): "145141913"
Test #6:
score: 0
Accepted
time: 6ms
memory: 7924kb
input:
0 0 18
output:
1
result:
ok 1 number(s): "1"
Test #7:
score: 0
Accepted
time: 14ms
memory: 8296kb
input:
0 12412414 18
output:
12412415
result:
ok 1 number(s): "12412415"
Test #8:
score: 0
Accepted
time: 3ms
memory: 6612kb
input:
32071009996106 682053093123 12
output:
443207413
result:
ok 1 number(s): "443207413"
Test #9:
score: 0
Accepted
time: 2ms
memory: 6592kb
input:
35533005762427 688386210611 9
output:
0
result:
ok 1 number(s): "0"
Test #10:
score: 0
Accepted
time: 15ms
memory: 7660kb
input:
35533005762427 688386210611 18
output:
132815685
result:
ok 1 number(s): "132815685"
Test #11:
score: 0
Accepted
time: 22ms
memory: 8828kb
input:
12412412412412 549755813887 18
output:
769139144
result:
ok 1 number(s): "769139144"
Test #12:
score: 0
Accepted
time: 16ms
memory: 7348kb
input:
12412412412412 549755813887 17
output:
256540093
result:
ok 1 number(s): "256540093"
Test #13:
score: 0
Accepted
time: 12ms
memory: 6888kb
input:
12412412412412 549755813887 15
output:
661919152
result:
ok 1 number(s): "661919152"
Test #14:
score: 0
Accepted
time: 3ms
memory: 7124kb
input:
8213830533897 180838478436 12
output:
960275439
result:
ok 1 number(s): "960275439"
Test #15:
score: 0
Accepted
time: 13ms
memory: 7224kb
input:
8213830533897 180838478436 18
output:
794870059
result:
ok 1 number(s): "794870059"
Test #16:
score: 0
Accepted
time: 3ms
memory: 6492kb
input:
56737445336495 759179417237 12
output:
0
result:
ok 1 number(s): "0"
Test #17:
score: 0
Accepted
time: 15ms
memory: 7204kb
input:
56737445336495 759179417237 18
output:
302105482
result:
ok 1 number(s): "302105482"
Test #18:
score: 0
Accepted
time: 4ms
memory: 7944kb
input:
56737445336495 759179417237 15
output:
0
result:
ok 1 number(s): "0"
Test #19:
score: 0
Accepted
time: 7ms
memory: 7724kb
input:
12412412412412 274877906944 18
output:
430003400
result:
ok 1 number(s): "430003400"
Test #20:
score: 0
Accepted
time: 7ms
memory: 8884kb
input:
32412412412412 274877906944 18
output:
657686236
result:
ok 1 number(s): "657686236"
Test #21:
score: 0
Accepted
time: 22ms
memory: 7432kb
input:
562949953421311 549755813887 18
output:
0
result:
ok 1 number(s): "0"
Test #22:
score: 0
Accepted
time: 17ms
memory: 7740kb
input:
985162418487295 549755813887 18
output:
0
result:
ok 1 number(s): "0"
Test #23:
score: 0
Accepted
time: 22ms
memory: 7620kb
input:
985162418487295 962072674303 18
output:
0
result:
ok 1 number(s): "0"
Test #24:
score: 0
Accepted
time: 21ms
memory: 7636kb
input:
35184372088831 962072674303 18
output:
665848241
result:
ok 1 number(s): "665848241"
Extra Test:
score: 0
Extra Test Passed