Submission #394912

#	Time	Username	Problem	Language	Result	Execution time	Memory
394912		Aryan_Raina	Miners (IOI07_miners)	C++14	100 / 100	191 ms	63852 KiB

miners

#include <bits/stdc++.h>
using namespace std; 

#define int long long
#define ld long double
#define ar array
 
const int INF = 1e17;
const int MOD = 998244353;

const int MXN = 1e5+9;
int dp[MXN][3][3][3][3];

void amax(int &a, int b) { a = max(a, b); }
int distinct(int i, int j, int k) {
    int ans = 0;
    for (int x = 0; x < 3; x++)
        if (i == x || j == x || k == x) ans++;
    return ans;
}
int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie();
    int n; string s; cin>>n>>s;
    for (int j = 0; j < 3; j++)
            for (int k = 0; k < 3; k++)
                for (int l = 0; l < 3; l++)
                    for (int m = 0; m < 3; m++) 
                        dp[0][j][k][l][m] = -6;
    int ans = -INF;
    for (int i = 1; i <= n; i++) {
        int cur = -1;
        if (s[i-1] == 'M') cur = 0;
        if (s[i-1] == 'F') cur = 1;
        if (s[i-1] == 'B') cur = 2;
        for (int j = 0; j < 3; j++)
            for (int k = 0; k < 3; k++)
                for (int l = 0; l < 3; l++)
                    for (int m = 0; m < 3; m++) 
                        dp[i][j][k][l][m] = -INF;
        for (int j = 0; j < 3; j++) {
            for (int k = 0; k < 3; k++) {
                for (int l = 0; l < 3; l++) {
                    for (int m = 0; m < 3; m++) {
                        int x1 = distinct(j, k, cur);
                        int x2 = distinct(l, m, cur);
                        amax(dp[i][k][cur][l][m], dp[i-1][j][k][l][m] + x1);
                        amax(dp[i][j][k][m][cur], dp[i-1][j][k][l][m] + x2);
                        amax(ans, dp[i][k][cur][l][m]);
                        amax(ans, dp[i][j][k][m][cur]);
                    }
                }
            }
        }
    }               
    cout<<ans<<"\n";
} 

• 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