Submission #72660

#	Time	Username	Problem	Language	Result	Execution time	Memory
72660		Hoget157	Miners (IOI07_miners)	C++14	100 / 100	195 ms	1220 KiB

miners

#include <bits/stdc++.h>
#define INF 1e+18
#define int long long
using namespace std;

int knd(int a,int b,int c){
	int cnt[4] = {};
	if(!cnt[a]) cnt[a]++;
	if(!cnt[b]) cnt[b]++;
	if(!cnt[c]) cnt[c]++;
	return cnt[1] + cnt[2] + cnt[3];
}

signed main(){
	int n,dp[2][4][4][4][4],now = 0,nxt = 1,ma = 0;
	string s;
	cin >> n >> s;
	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++){
					dp[0][i][j][k][l] = -INF;
					dp[1][i][j][k][l] = -INF;
				}
			}
		}
	}
	dp[0][0][0][0][0] = 0;
	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++){
						int num,add = 0;
						if(s[i] == 'M') num = 1;
						else if(s[i] == 'B') num = 2;
						else num = 3;
						dp[nxt][k][num][l][m] = max(dp[nxt][k][num][l][m],dp[now][j][k][l][m] + knd(j,k,num));
						dp[nxt][j][k][m][num] = max(dp[nxt][j][k][m][num],dp[now][j][k][l][m] + knd(l,m,num));
					}
				}
			}
		}
		
		swap(now,nxt);
	}
	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++) ma = max(ma,dp[now][i][j][k][l]);
			}
		}
	}
	cout << ma << endl;
	return 0;
}

Compilation message (stderr)

miners.cpp: In function 'int main()':
miners.cpp:34:15: warning: unused variable 'add' [-Wunused-variable]
       int num,add = 0;
               ^~~

• Subtask 1: 9 / 9
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 7 / 7
• Subtask 7: 8 / 8
• Subtask 8: 8 / 8
• Subtask 9: 8 / 8
• Subtask 10: 8 / 8
• Subtask 11: 8 / 8
• Subtask 12: 8 / 8