제출 #592349

#제출 시각아이디문제언어결과실행 시간메모리
592349HanksburgerMiners (IOI07_miners)C++17
100 / 100
195 ms100604 KiB
#include <bits/stdc++.h> using namespace std; int dp[100005][4][4][4][4]; int f(int x, int y, int z) { if (x) { if (x==y && y==z) return 1; else if ((x==y)^(y==z)^(z==x)) return 2; else return 3; } if (y) { if (y==z) return 1; else return 2; } return 1; } int main() { ios::sync_with_stdio(0); cin.tie(0); cout.tie(0); int n, ans=0; cin >> n; for (int i=0; i<=n; i++) for (int j=0; j<4; j++) for (int k=0; k<4; k++) for (int l=0; l<4; l++) for (int m=0; m<4; m++) dp[i][j][k][l][m]=-1e9; dp[0][0][0][0][0]=0; for (int i=1; i<=n; i++) { char c; cin >> c; int x=(c=='M'?1:(c=='F'?2:3)); for (int j=0; j<4; j++) { for (int k=0; k<4; k++) { for (int l=0; l<4; l++) { for (int m=0; m<4; m++) { dp[i][j][x][l][m]=max(dp[i][j][x][l][m], dp[i-1][k][j][l][m]+f(k, j, x)); // if (dp[i][j][x][l][m]>=1) // cout << i << ' ' << j << ' ' << x << ' ' << l << ' ' << m << ' ' << dp[i][j][x][l][m] << '\n'; } } } } for (int j=0; j<4; j++) { for (int k=0; k<4; k++) { for (int l=0; l<4; l++) { for (int m=0; m<4; m++) { dp[i][j][k][l][x]=max(dp[i][j][k][l][x], dp[i-1][j][k][m][l]+f(m, l, x)); // if (dp[i][j][k][l][x]>=1) // cout << i << ' ' << j << ' ' << k << ' ' << l << ' ' << x << ' ' << dp[i][j][k][l][x] << '\n'; } } } } } for (int i=0; i<4; i++) for (int j=0; j<4; j++) for (int k=0; k<4; k++) for (int l=0; l<4; l++) ans=max(ans, dp[n][i][j][k][l]); cout << ans; return 0; }
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