#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
#define yes cout << "YES\n"
#define no cout << "NO\n"
#define F first
#define S second
#define pb push_back
#define mp make_pair
#define all(x) (x).begin(), (x).end()
#define int long long
const int N = 100002;
int pref[N][3];
void solve(){
int n;
cin >> n;
string s;
cin >> s;
int a[n];
for(int i=0; i< n; i++){
if(s[i]=='J')a[i]=0;
else if(s[i]=='O')a[i]=1;
else a[i]=2;
}
for(int i=1; i<=n; i++){
for(int j=0; j< 3; j++){
pref[i][j]=pref[i-1][j];
}
pref[i][a[i-1]]++;
}
int ans=0;
int mx=0;
for(int i=1; i<=n; i++){
if(a[i-1]==1){
ans+=pref[i][0]*(pref[n][2]-pref[i][2]);
}
mx=max(mx, pref[i][0]*(pref[n][2]-pref[i][2]));
}
int add1=0;
int add2=0;
for(int i=n; i>=1; i--){
if(a[i-1]==1){
add1+=pref[n][2]-pref[i][2];
}
}
for(int i=1; i<=n; i++){
if(a[i-1]==1)add2+=pref[i][0];
}
cout << ans+max({mx, add1, add2}) << '\n';
}
signed main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
solve();
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
1 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
344 KB |
Output is correct |
| 9 |
Correct |
0 ms |
344 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
1 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
344 KB |
Output is correct |
| 9 |
Correct |
0 ms |
344 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
1 ms |
456 KB |
Output is correct |
| 17 |
Correct |
1 ms |
348 KB |
Output is correct |
| 18 |
Correct |
1 ms |
352 KB |
Output is correct |
| 19 |
Correct |
1 ms |
348 KB |
Output is correct |
| 20 |
Correct |
1 ms |
352 KB |
Output is correct |
| 21 |
Correct |
1 ms |
352 KB |
Output is correct |
| 22 |
Correct |
1 ms |
352 KB |
Output is correct |
| 23 |
Correct |
1 ms |
604 KB |
Output is correct |
| 24 |
Correct |
1 ms |
348 KB |
Output is correct |
| 25 |
Correct |
1 ms |
352 KB |
Output is correct |
| 26 |
Correct |
1 ms |
352 KB |
Output is correct |
| 27 |
Correct |
1 ms |
352 KB |
Output is correct |
| 28 |
Correct |
1 ms |
432 KB |
Output is correct |
| 29 |
Correct |
1 ms |
348 KB |
Output is correct |
| 30 |
Correct |
1 ms |
348 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
1 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
344 KB |
Output is correct |
| 9 |
Correct |
0 ms |
344 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
1 ms |
456 KB |
Output is correct |
| 17 |
Correct |
1 ms |
348 KB |
Output is correct |
| 18 |
Correct |
1 ms |
352 KB |
Output is correct |
| 19 |
Correct |
1 ms |
348 KB |
Output is correct |
| 20 |
Correct |
1 ms |
352 KB |
Output is correct |
| 21 |
Correct |
1 ms |
352 KB |
Output is correct |
| 22 |
Correct |
1 ms |
352 KB |
Output is correct |
| 23 |
Correct |
1 ms |
604 KB |
Output is correct |
| 24 |
Correct |
1 ms |
348 KB |
Output is correct |
| 25 |
Correct |
1 ms |
352 KB |
Output is correct |
| 26 |
Correct |
1 ms |
352 KB |
Output is correct |
| 27 |
Correct |
1 ms |
352 KB |
Output is correct |
| 28 |
Correct |
1 ms |
432 KB |
Output is correct |
| 29 |
Correct |
1 ms |
348 KB |
Output is correct |
| 30 |
Correct |
1 ms |
348 KB |
Output is correct |
| 31 |
Correct |
2 ms |
3676 KB |
Output is correct |
| 32 |
Correct |
3 ms |
3668 KB |
Output is correct |
| 33 |
Correct |
2 ms |
3676 KB |
Output is correct |
| 34 |
Correct |
2 ms |
3676 KB |
Output is correct |
| 35 |
Correct |
2 ms |
3656 KB |
Output is correct |
| 36 |
Correct |
4 ms |
3932 KB |
Output is correct |
| 37 |
Correct |
3 ms |
3932 KB |
Output is correct |
| 38 |
Correct |
3 ms |
3676 KB |
Output is correct |
| 39 |
Correct |
3 ms |
3684 KB |
Output is correct |
| 40 |
Correct |
3 ms |
3676 KB |
Output is correct |
| 41 |
Correct |
3 ms |
3676 KB |
Output is correct |
| 42 |
Correct |
3 ms |
3680 KB |
Output is correct |
| 43 |
Correct |
3 ms |
3676 KB |
Output is correct |
| 44 |
Correct |
5 ms |
3872 KB |
Output is correct |
| 45 |
Correct |
2 ms |
3676 KB |
Output is correct |
