Submission #117157

#	Time	Username	Problem	Language	Result	Execution time	Memory
117157		onjo0127	스탬프 수집 (JOI16_ho_t2)	C++11	100 / 100	34 ms	1380 KiB

2016_ho_t2

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

char S[100009];
int J[100009], I[100009];

int main() {
    int N; scanf("%d",&N);
    for(int i=1; i<=N; i++) scanf(" %c", &S[i]);
    for(int i=1; i<=N; i++) J[i] = J[i-1] + (S[i] == 'J');
    for(int i=N; i>=1; i--) I[i] = I[i+1] + (S[i] == 'I');
    long long s1 = 0, s2 = 0, s3 = 0, mx = 0;
    for(int i=1; i<=N; i++) {
        if(S[i] == 'O') {
            s1 += 1LL * (J[i] + 1) * I[i];
            s2 += 1LL * J[i] * (I[i] + 1);
            s3 += 1LL * J[i] * I[i];
        }
        mx = max(mx, 1LL * J[i] * I[i]);
    }
    printf("%lld", max({s1, s2, s3 + mx}));
    return 0;
}

Compilation message (stderr)

2016_ho_t2.cpp: In function 'int main()':
2016_ho_t2.cpp:8:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     int N; scanf("%d",&N);
            ~~~~~^~~~~~~~~
2016_ho_t2.cpp:9:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i=1; i<=N; i++) scanf(" %c", &S[i]);
                             ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 20 / 20
• Subtask 3: 50 / 50