Submission #974800

#	Time	Username	Problem	Language	Result	Execution time	Memory
974800		marinaluca	Miners (IOI07_miners)	C++17	100 / 100	37 ms	1112 KiB

miners

#include <bits/stdc++.h>
#pragma GCC optimize ("O4")
#pragma GCC optimize ("fast-math")
#pragma GCC optimize ("unroll-loops")

using namespace std;
#define int long long
#define ll long long
#define xx first
#define yy second
#define all (x) begin(x), end(x)

int n;
const int NMAX = 1e5;
const int VMAX = 3;
int v[NMAX + 1];
int dp[VMAX][VMAX + 1][VMAX + 1][VMAX + 1][VMAX + 1];

int eg (int a, int b, int c)
{
    int k = 0;
    for (int i = 1; i <= 3; ++ i){
        if ((a == i) || (b == i) || (c == i))
            k ++;
    }
    return k;
}
signed main(void){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> n;
    for (int i = 1; i <= n; ++ i){
        char s;
        cin >> s;
        if (s == 'M')
            v[i] = 1;
        if (s == 'F')
            v[i] = 2;
        if (s == 'B')
            v[i] = 3;
    }
    int x = 1, y = 0;
    for (int i = n; i >= 0; -- i){
        swap (x, y);
        for (int j = 0; j <= VMAX; ++ j){
            for (int k = 0; k <= VMAX; ++ k){
                for (int l = 0; l <= VMAX; ++ l)
                {
                    for (int m = 0; m <= VMAX; ++ m){
                        dp[x][j][k][l][m] = max (dp[y][k][v[i]][l][m] + eg(j, k, v[i]), dp[y][j][k][m][v[i]] + eg(l, m, v[i]));
                    }
                }
            }
        }
    }
    cout << dp[x][0][0][0][0];
    return 0 ^ 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