#include <bits/stdc++.h>
using namespace std;
typedef pair<int, int> pii;
typedef long long ll;
const int MX=100010, inf=2e9;
int n;
char S[MX];
int Jcnt[MX], Icnt[MX];
ll base;
ll J(){
ll res=base;
for(int i=1; i<=n; i++)
if(S[i]=='O') res+=Icnt[i];
return res;
}
ll I(){
ll res=base;
for(int i=n; i>=1; i--)
if(S[i]=='O') res+=Jcnt[i];
return res;
}
ll O(){
ll mx=0;
for(int i=1; i<=n; i++){
mx=max(mx, 1LL*Jcnt[i-1]*Icnt[i]);
}
return base+mx;
}
int main(){
ios::sync_with_stdio(0); cin.tie(0);
cin>>n>>(S+1);
for(int i=1; i<=n; i++)
Jcnt[i]=Jcnt[i-1]+(S[i]=='J');
for(int i=n; i>=1; i--)
Icnt[i]=Icnt[i+1]+(S[i]=='I');
for(int i=1; i<=n; i++)
if(S[i]=='O') base+=1LL*Jcnt[i]*Icnt[i];
ll ans=max({J(), I(), O()});
cout<<ans;
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
488 KB |
Output is correct |
| 3 |
Correct |
3 ms |
488 KB |
Output is correct |
| 4 |
Correct |
4 ms |
640 KB |
Output is correct |
| 5 |
Correct |
3 ms |
752 KB |
Output is correct |
| 6 |
Correct |
2 ms |
752 KB |
Output is correct |
| 7 |
Correct |
3 ms |
868 KB |
Output is correct |
| 8 |
Correct |
3 ms |
868 KB |
Output is correct |
| 9 |
Correct |
2 ms |
868 KB |
Output is correct |
| 10 |
Correct |
2 ms |
868 KB |
Output is correct |
| 11 |
Correct |
2 ms |
884 KB |
Output is correct |
| 12 |
Correct |
2 ms |
884 KB |
Output is correct |
| 13 |
Correct |
3 ms |
884 KB |
Output is correct |
| 14 |
Correct |
3 ms |
884 KB |
Output is correct |
| 15 |
Correct |
2 ms |
884 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
488 KB |
Output is correct |
| 3 |
Correct |
3 ms |
488 KB |
Output is correct |
| 4 |
Correct |
4 ms |
640 KB |
Output is correct |
| 5 |
Correct |
3 ms |
752 KB |
Output is correct |
| 6 |
Correct |
2 ms |
752 KB |
Output is correct |
| 7 |
Correct |
3 ms |
868 KB |
Output is correct |
| 8 |
Correct |
3 ms |
868 KB |
Output is correct |
| 9 |
Correct |
2 ms |
868 KB |
Output is correct |
| 10 |
Correct |
2 ms |
868 KB |
Output is correct |
| 11 |
Correct |
2 ms |
884 KB |
Output is correct |
| 12 |
Correct |
2 ms |
884 KB |
Output is correct |
| 13 |
Correct |
3 ms |
884 KB |
Output is correct |
| 14 |
Correct |
3 ms |
884 KB |
Output is correct |
| 15 |
Correct |
2 ms |
884 KB |
Output is correct |
| 16 |
Correct |
2 ms |
884 KB |
Output is correct |
| 17 |
Correct |
3 ms |
884 KB |
Output is correct |
| 18 |
Correct |
3 ms |
884 KB |
Output is correct |
| 19 |
Correct |
3 ms |
884 KB |
Output is correct |
| 20 |
Correct |
2 ms |
884 KB |
Output is correct |
| 21 |
Correct |
2 ms |
884 KB |
Output is correct |
| 22 |
Correct |
3 ms |
884 KB |
Output is correct |
| 23 |
Correct |
3 ms |
884 KB |
Output is correct |
| 24 |
Correct |
3 ms |
884 KB |
Output is correct |
| 25 |
Correct |
2 ms |
884 KB |
Output is correct |
| 26 |
Correct |
2 ms |
892 KB |
Output is correct |
| 27 |
Correct |
3 ms |
892 KB |
Output is correct |
| 28 |
Correct |
2 ms |
892 KB |
Output is correct |
| 29 |
Correct |
2 ms |
892 KB |
Output is correct |
| 30 |
Correct |
2 ms |
892 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
488 KB |
Output is correct |
| 3 |
Correct |
3 ms |
488 KB |
Output is correct |
| 4 |
Correct |
4 ms |
640 KB |
Output is correct |
| 5 |
Correct |
3 ms |
752 KB |
Output is correct |
| 6 |
Correct |
2 ms |
752 KB |
Output is correct |
| 7 |
Correct |
3 ms |
868 KB |
Output is correct |
| 8 |
Correct |
3 ms |
868 KB |
Output is correct |
| 9 |
Correct |
2 ms |
868 KB |
Output is correct |
| 10 |
Correct |
2 ms |
868 KB |
Output is correct |
| 11 |
Correct |
2 ms |
884 KB |
Output is correct |
| 12 |
Correct |
2 ms |
884 KB |
Output is correct |
| 13 |
Correct |
3 ms |
884 KB |
Output is correct |
| 14 |
Correct |
3 ms |
884 KB |
Output is correct |
| 15 |
Correct |
2 ms |
884 KB |
Output is correct |
| 16 |
Correct |
2 ms |
884 KB |
Output is correct |
| 17 |
Correct |
3 ms |
884 KB |
Output is correct |
| 18 |
Correct |
3 ms |
884 KB |
Output is correct |
| 19 |
Correct |
3 ms |
884 KB |
Output is correct |
| 20 |
Correct |
2 ms |
884 KB |
Output is correct |
| 21 |
Correct |
2 ms |
884 KB |
Output is correct |
| 22 |
Correct |
3 ms |
884 KB |
Output is correct |
| 23 |
Correct |
3 ms |
884 KB |
Output is correct |
| 24 |
Correct |
3 ms |
884 KB |
Output is correct |
| 25 |
Correct |
2 ms |
884 KB |
Output is correct |
| 26 |
Correct |
2 ms |
892 KB |
Output is correct |
| 27 |
Correct |
3 ms |
892 KB |
Output is correct |
| 28 |
Correct |
2 ms |
892 KB |
Output is correct |
| 29 |
Correct |
2 ms |
892 KB |
Output is correct |
| 30 |
Correct |
2 ms |
892 KB |
Output is correct |
| 31 |
Correct |
4 ms |
1732 KB |
Output is correct |
| 32 |
Correct |
5 ms |
1868 KB |
Output is correct |
| 33 |
Correct |
5 ms |
1948 KB |
Output is correct |
| 34 |
Correct |
5 ms |
2064 KB |
Output is correct |
| 35 |
Correct |
5 ms |
2164 KB |
Output is correct |
| 36 |
Correct |
6 ms |
2392 KB |
Output is correct |
| 37 |
Correct |
5 ms |
2392 KB |
Output is correct |
| 38 |
Correct |
5 ms |
2480 KB |
Output is correct |
| 39 |
Correct |
6 ms |
2584 KB |
Output is correct |
| 40 |
Correct |
5 ms |
2704 KB |
Output is correct |
| 41 |
Correct |
5 ms |
2800 KB |
Output is correct |
| 42 |
Correct |
5 ms |
2904 KB |
Output is correct |
| 43 |
Correct |
5 ms |
3000 KB |
Output is correct |
| 44 |
Correct |
6 ms |
3228 KB |
Output is correct |
| 45 |
Correct |
5 ms |
3244 KB |
Output is correct |
