Submission #696779

#	Time	Username	Problem	Language	Result	Execution time	Memory
696779		Cross_Ratio	Toilets (JOI16_toilets)	C++14	100 / 100	27 ms	5424 KiB

toilets

#include <bits/stdc++.h>
#define int long long
using namespace std;
string s[100005];
int A[100005];
signed main() {
    cin.sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int N;
    int M;
    cin >> N >> M;
    int i, j;
    for(i=0;i<M;i++) cin >> s[i] >> A[i];
    int ma = 0;
    int sum = 0;
    for(i=M-1;i>=0;i--) {
        int cnt = 0;
        int ma2 = 0;
        for(j=s[i].length()-1;j>=0;j--) {
            if(s[i][j]=='M') cnt++;
            else cnt--;
            ma2 = max(ma2, cnt);
        }
        if(cnt<=0) ma = max(ma, sum + ma2);
        else ma = max(ma, sum + ma2 + (A[i]-1) * cnt);
        sum += cnt * A[i];
    }
    cout << (sum <= 0 ? max(0LL,ma-1) : -1);
}

• Subtask 1: 14 / 14
• Subtask 2: 22 / 22
• Subtask 3: 64 / 64