#include <bits/stdc++.h>
using namespace std;
typedef vector<int> VI;
typedef pair <int,int> ii;
typedef long long LL;
#define pb push_back
const int INF = 2147483647;
const int N = 1005;
int n, m, tab[2][N], j, a, b, prep[40], bat[40], res[40];
LL i;
bool isOk() {
int i = 0;
while (!prep[bat[i]]) i++;
int j = n - 1;
while (!prep[bat[j]]) j--;
while (++i < j) if (!prep[bat[i]]) return false;
return true;
}
int main() {
scanf("%d %d", &n, &m);
for (i=0;i<m;i++) scanf("%d %d", &tab[0][i], &tab[1][i]);
for (i=1;i<(1LL<<n);i++) {
for (j=0;j<n;j++) {
prep[j] = ((1LL<<j) & i);
bat[j] = j;
}
for (j=0;j<m;j++) {
a = tab[0][j] - 1;
b = tab[1][j] - 1;
if (prep[bat[a]] && !prep[bat[b]]) swap(bat[a], bat[b]);
}
if (isOk()) res[__builtin_popcount(i)]++;
}
for (i=1;i<=n;i++) printf("%d ", res[i] % 2);
printf("\n");
return 0;
}
1 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 | #include <bits/stdc++.h> using namespace std; typedef vector<int> VI; typedef pair <int,int> ii; typedef long long LL; #define pb push_back const int INF = 2147483647; const int N = 1005; int n, m, tab[2][N], j, a, b, prep[40], bat[40], res[40]; LL i; bool isOk() { int i = 0; while (!prep[bat[i]]) i++; int j = n - 1; while (!prep[bat[j]]) j--; while (++i < j) if (!prep[bat[i]]) return false; return true; } int main() { scanf("%d %d", &n, &m); for (i=0;i<m;i++) scanf("%d %d", &tab[0][i], &tab[1][i]); for (i=1;i<(1LL<<n);i++) { for (j=0;j<n;j++) { prep[j] = ((1LL<<j) & i); bat[j] = j; } for (j=0;j<m;j++) { a = tab[0][j] - 1; b = tab[1][j] - 1; if (prep[bat[a]] && !prep[bat[b]]) swap(bat[a], bat[b]); } if (isOk()) res[__builtin_popcount(i)]++; } for (i=1;i<=n;i++) printf("%d ", res[i] % 2); printf("\n"); return 0; } |
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