Submission #2145692


Source Code Expand

#include <cstdio>
#include <cstring>
#include <algorithm>
#define P 1000000007
#define ct(x) __builtin_popcount(x)
#define Log(x) (Sym[(x) % 37])

using namespace std;

int n, m, B[15], R[15], Sym[55];

long long F[1 << 15], ans = 1;

int main() {
    for(int i = 0; i < 30; i++) Sym[(1 << i) % 37] = i;
    scanf("%d%d", &n, &m);
    for(int i = 1; i <= m; i++) ans = ans * 2 % P;
    while(m--) {
        int x, y;
        scanf("%d%d", &x, &y);
        B[--x] |= (1 << --y);
        R[y] |= (1 << x);
    }
    F[0] = 1;
    for(int i = 1; i < (1 << n); i++) if(!!(i & 1) ^ !(i & 2))
        for(int j = i; j; j = (j - 1) & i) if(!!(j & 1) ^ !(j & 2)) {
            long long s = (1 << n) - i - 1, tmp = 1;
            for(int k = 0; k < n; k++)
                if((s >> k) & 1) tmp = tmp * ((1 << ct(B[k] & j)) - 1) % P * (1 << ct(R[k] & j)) % P;
            F[i] = (F[i - j] * tmp + F[i]) % P;
        }
    printf("%lld\n", ((ans - F[(1 << n) - 1]) % P + P) % P);
    return 0;
}

Submission Info

Submission Time
Task F - Games on DAG
User lastans7
Language C++14 (GCC 5.4.1)
Score 1600
Code Size 1018 Byte
Status AC
Exec Time 313 ms
Memory 384 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:16:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
                          ^
./Main.cpp:20:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &x, &y);
                              ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 1600 / 1600
Status
AC × 4
AC × 40
Set Name Test Cases
Sample 0_00.txt, 0_01.txt, 0_02.txt, 0_03.txt
All 0_00.txt, 0_01.txt, 0_02.txt, 0_03.txt, 1_00.txt, 1_01.txt, 1_02.txt, 1_03.txt, 1_04.txt, 1_05.txt, 1_06.txt, 1_07.txt, 1_08.txt, 1_09.txt, 1_10.txt, 1_11.txt, 1_12.txt, 1_13.txt, 1_14.txt, 1_15.txt, 1_16.txt, 1_17.txt, 1_18.txt, 1_19.txt, 1_20.txt, 1_21.txt, 1_22.txt, 1_23.txt, 1_24.txt, 1_25.txt, 1_26.txt, 1_27.txt, 1_28.txt, 1_29.txt, 1_30.txt, 1_31.txt, 1_32.txt, 1_33.txt, 1_34.txt, 1_35.txt
Case Name Status Exec Time Memory
0_00.txt AC 1 ms 128 KB
0_01.txt AC 1 ms 128 KB
0_02.txt AC 1 ms 128 KB
0_03.txt AC 1 ms 128 KB
1_00.txt AC 1 ms 128 KB
1_01.txt AC 308 ms 384 KB
1_02.txt AC 308 ms 384 KB
1_03.txt AC 308 ms 384 KB
1_04.txt AC 308 ms 384 KB
1_05.txt AC 308 ms 384 KB
1_06.txt AC 308 ms 384 KB
1_07.txt AC 309 ms 384 KB
1_08.txt AC 308 ms 384 KB
1_09.txt AC 308 ms 384 KB
1_10.txt AC 308 ms 384 KB
1_11.txt AC 308 ms 384 KB
1_12.txt AC 313 ms 384 KB
1_13.txt AC 308 ms 384 KB
1_14.txt AC 310 ms 384 KB
1_15.txt AC 310 ms 384 KB
1_16.txt AC 308 ms 384 KB
1_17.txt AC 308 ms 384 KB
1_18.txt AC 308 ms 384 KB
1_19.txt AC 308 ms 384 KB
1_20.txt AC 308 ms 384 KB
1_21.txt AC 1 ms 128 KB
1_22.txt AC 308 ms 384 KB
1_23.txt AC 308 ms 384 KB
1_24.txt AC 97 ms 256 KB
1_25.txt AC 1 ms 128 KB
1_26.txt AC 309 ms 384 KB
1_27.txt AC 10 ms 256 KB
1_28.txt AC 308 ms 384 KB
1_29.txt AC 31 ms 256 KB
1_30.txt AC 10 ms 256 KB
1_31.txt AC 308 ms 384 KB
1_32.txt AC 31 ms 256 KB
1_33.txt AC 10 ms 256 KB
1_34.txt AC 97 ms 256 KB
1_35.txt AC 31 ms 256 KB