제출 #785130

#제출 시각아이디문제언어결과실행 시간메모리
785130khshg메기 농장 (IOI22_fish)C++17
0 / 100
1178 ms2097152 KiB
#include<bits/stdc++.h> using namespace std; long long max_weights(int N, int M, vector<int> X, vector<int> Y, vector<int> W) { vector<vector<int>> c(N + 1, vector<int>(N + 1)); for(int i = 0; i < M; ++i) { c[X[i]][Y[i]] = W[i]; } vector<vector<long long>> dp(N + 1, vector<long long>(N + 1)), bestdp; bestdp = dp; dp[0][0] = 0; bestdp[0][0] = 0; for(int i = 1; i <= N; ++i) { dp[0][i] = dp[0][i - 1] + c[1][i - 1]; bestdp[0][i] = max(bestdp[0][i - 1], dp[0][i]); } for(int i = 1; i < N; ++i) { dp[i][0] = 0; for(int j = 0; j <= N; ++j) { dp[i][0] = max(dp[i][0], dp[i - 1][j]); } bestdp[i][0] = dp[i][0]; for(int j = 1; j <= N; ++j) { dp[i][j] = dp[i - 1][j] - c[i][j - 1]; dp[i][j] = max(dp[i][j], (i - 2 < 0 ? 0 : bestdp[i - 2][j - 1]) + c[i - 1][j - 1]); dp[i][j] = max(dp[i][j], (i - 2 < 0 ? 0 : bestdp[i - 2][N])); dp[i][j] += c[i + 1][j - 1]; bestdp[i][j] = max(bestdp[i][j - 1], dp[i][j]); } } return bestdp[N - 1][N]; }
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