# | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
958652 | 2024-04-06T09:45:18 Z | Mher777 | Trading (IZhO13_trading) | C++17 | 1 ms | 2392 KB |
#include <iostream> #include <algorithm> #include <cmath> #include <vector> #include <string> #include <cstring> #include <map> #include <unordered_map> #include <set> #include <queue> #include <iomanip> #include <bitset> #include <stack> #include <cassert> #include <iterator> #include <fstream> #define mod 1000000007ll #define LL long long #define LD long double #define MP make_pair #define PB push_back #define all(v) v.begin(), v.end() using namespace std; const int N = 100005; int n, m, a[4][N], dp[N][(1 << 2) + 4], msk[N]; int main() { cin >> n >> m; while (m--) { int y, x; scanf("%d%d", &x, &y); y--; msk[x] |= (1 << y); } dp[0][3] = 1; for (int i = 0; i <= n; i++) { for (int mask = 0; mask < (1 << 2); mask++) { if ((mask & msk[i]) != msk[i]) continue; //cout << "dp[" << i << "][" << mask << "]=" << dp[i][mask] << endl; for (int nxt = 0; nxt < (1 << 2); nxt++) { if ((nxt & msk[i + 1]) != msk[i + 1]) continue; LL x = 1; for (int j = 0; j <= 1; j++) { int bit1 = (bool)(mask & (1 << j)); int bit2 = (bool)(nxt & (1 << j)); if (bit1 == 0 && (bit2 == 0 || ((1 << j) & msk[i + 1]) != 0)) x = 0; } dp[i + 1][nxt] += (x * dp[i][mask]) % mod; dp[i + 1][nxt] %= mod; } } if (msk[i + 1] == 0) { dp[i + 1][3] += dp[i][3]; dp[i + 1][3] %= mod; } } cout << dp[n][3] << endl; return 0; } /* */
Compilation message
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Incorrect | 1 ms | 2392 KB | Output isn't correct |
2 | Halted | 0 ms | 0 KB | - |