제출 #771403

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
771403	2023-07-02 23:46:20	gggkik	스탬프 수집 (JOI16_ho_t2)	C++14	100 / 100	6 ms	5332 KiB

2016_ho_t2

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#include <bits/stdc++.h>
using namespace std;
const int MXN = 1e5+5;
long long J[2][MXN], O[2][MXN], I[2][MXN], n;
char A[MXN];
int main() {
    cin.tie(0)->sync_with_stdio(0);
    cin >> n;
    for(int i = 1;i<=n;i++) cin >> A[i];
    for(int i = n;i;i--){
        I[1][i] = I[1][i+1];
        O[1][i] = O[1][i+1];
        J[1][i] = J[1][i+1];
        if(A[i]=='I') I[1][i]++;
        if(A[i]=='O') O[1][i]+=I[1][i];
        if(A[i]=='J') J[1][i]+=O[1][i];
    }
    long long ans = 0;
    for(int i = 0;i<=n;i++){
        J[0][i] = J[0][i-1];
        O[0][i] = O[0][i-1];
        I[0][i] = I[0][i-1];
        if(A[i]=='J') J[0][i]++;
        if(A[i]=='O') O[0][i]+=J[0][i];
        if(A[i]=='I') I[0][i]+=O[0][i];
        ans = max(ans,J[1][1]+max({
            O[1][i+1],
            1LL*J[0][i]*I[1][i+1],
            O[0][i],
        }));
 
 
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• Subtask 1: 30 / 30
• Subtask 2: 20 / 20
• Subtask 3: 50 / 50