QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#625377 | #8150. XOR Sum | Layn# | AC ✓ | 361ms | 11368kb | C++14 | 1.6kb | 2024-10-09 18:55:55 | 2024-10-09 18:55:56 |
Judging History
answer
//
// Created by Layn on 24-10-9.
//
#include <iostream>
#include <cstdio>
#include <cstring>
#include <map>
using namespace std;
const int mod = 1000000007;
long long n = 0, m = 0, k = 0;
map<pair<int, pair<long long, int> >, int> vis;
map<pair<int, pair<long long, int> >, int> f;
int C[205][205];
int dfs(int x, long long w, int y) {
if (w < 0) return 0;
if (w - k / 2 * (k - k / 2) * ((1ll << (x + 1)) - 1) > 0)
return 0;
if (x < 0) return 1;
pair<int, pair<long long, int> > st = make_pair(x, make_pair(w, y));
if (vis[st]) return f[st];
vis[st] = true;
int res = 0;
long long val = (1ll << x);
for (int i = 0; i <= k; i++) {
// i: 0 , k - i: 1
long long d = i * (k - i) * val;
if (w - d < 0) continue;
if ((m >> x) & 1) {
for (int j = 0; j <= min((long long)y, k - i); j++)
res = (res + (long long)dfs(x - 1, w - d, j) * C[y][j] % mod * C[k - y][k - i - j] % mod) % mod;
} else {
if (k - i > k - y) continue;
res = (res + (long long)dfs(x - 1, w - d, y) * C[k - y][k - i]) % mod;
}
}
//return vis[make_pair(x, w)] = true;
f[st] = res;
return res;
}
int main() {
scanf("%lld%lld%lld", &n, &m, &k);
for (int i = 0; i <= k; i++) C[i][0] = 1;
for (int i = 1; i <= k; i++)
for (int j = 1; j <= i; j++)
C[i][j] = (C[i - 1][j] + C[i - 1][j - 1]) % mod;
int t = 0;
for (t = 0; (1ll << t) <= m; t++);
t--;
printf("%d\n", dfs(t, n, k));
return 0;
}
// 10000000000000 1000000000000 18
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: 0ms
memory: 3900kb
input:
6 2 3
output:
12
result:
ok 1 number(s): "12"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3820kb
input:
30 6 5
output:
1520
result:
ok 1 number(s): "1520"
Test #3:
score: 0
Accepted
time: 0ms
memory: 3768kb
input:
0 0 1
output:
1
result:
ok 1 number(s): "1"
Test #4:
score: 0
Accepted
time: 0ms
memory: 3904kb
input:
0 0 2
output:
1
result:
ok 1 number(s): "1"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3924kb
input:
0 1145141919 2
output:
145141913
result:
ok 1 number(s): "145141913"
Test #6:
score: 0
Accepted
time: 0ms
memory: 3904kb
input:
0 0 18
output:
1
result:
ok 1 number(s): "1"
Test #7:
score: 0
Accepted
time: 1ms
memory: 3888kb
input:
0 12412414 18
output:
12412415
result:
ok 1 number(s): "12412415"
Test #8:
score: 0
Accepted
time: 20ms
memory: 5740kb
input:
32071009996106 682053093123 12
output:
443207413
result:
ok 1 number(s): "443207413"
Test #9:
score: 0
Accepted
time: 0ms
memory: 3960kb
input:
35533005762427 688386210611 9
output:
0
result:
ok 1 number(s): "0"
Test #10:
score: 0
Accepted
time: 183ms
memory: 11120kb
input:
35533005762427 688386210611 18
output:
132815685
result:
ok 1 number(s): "132815685"
Test #11:
score: 0
Accepted
time: 361ms
memory: 11268kb
input:
12412412412412 549755813887 18
output:
769139144
result:
ok 1 number(s): "769139144"
Test #12:
score: 0
Accepted
time: 120ms
memory: 6992kb
input:
12412412412412 549755813887 17
output:
256540093
result:
ok 1 number(s): "256540093"
Test #13:
score: 0
Accepted
time: 65ms
memory: 6080kb
input:
12412412412412 549755813887 15
output:
661919152
result:
ok 1 number(s): "661919152"
Test #14:
score: 0
Accepted
time: 15ms
memory: 5648kb
input:
8213830533897 180838478436 12
output:
960275439
result:
ok 1 number(s): "960275439"
Test #15:
score: 0
Accepted
time: 165ms
memory: 10996kb
input:
8213830533897 180838478436 18
output:
794870059
result:
ok 1 number(s): "794870059"
Test #16:
score: 0
Accepted
time: 1ms
memory: 3784kb
input:
56737445336495 759179417237 12
output:
0
result:
ok 1 number(s): "0"
Test #17:
score: 0
Accepted
time: 161ms
memory: 10656kb
input:
56737445336495 759179417237 18
output:
302105482
result:
ok 1 number(s): "302105482"
Test #18:
score: 0
Accepted
time: 21ms
memory: 5492kb
input:
56737445336495 759179417237 15
output:
0
result:
ok 1 number(s): "0"
Test #19:
score: 0
Accepted
time: 47ms
memory: 11368kb
input:
12412412412412 274877906944 18
output:
430003400
result:
ok 1 number(s): "430003400"
Test #20:
score: 0
Accepted
time: 43ms
memory: 10092kb
input:
32412412412412 274877906944 18
output:
657686236
result:
ok 1 number(s): "657686236"
Test #21:
score: 0
Accepted
time: 0ms
memory: 3784kb
input:
562949953421311 549755813887 18
output:
0
result:
ok 1 number(s): "0"
Test #22:
score: 0
Accepted
time: 0ms
memory: 3912kb
input:
985162418487295 549755813887 18
output:
0
result:
ok 1 number(s): "0"
Test #23:
score: 0
Accepted
time: 0ms
memory: 3964kb
input:
985162418487295 962072674303 18
output:
0
result:
ok 1 number(s): "0"
Test #24:
score: 0
Accepted
time: 334ms
memory: 11136kb
input:
35184372088831 962072674303 18
output:
665848241
result:
ok 1 number(s): "665848241"
Extra Test:
score: 0
Extra Test Passed