oj.uz

Submission #146749

# Submission time Handle Problem Language Result Execution time Memory
146749 2019-08-25T21:39:57 Z TadijaSebez None (JOI16_ho_t2) C++11
100 / 100
 6 ms 1312 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int N=100050;
char s[N];
ll Calc(int l, int r)
{
	ll J=0,O=0,I=0;
	for(int i=l;i<=r;i++)
	{
		if(s[i]=='J') J++;
		if(s[i]=='O') O+=J;
		if(s[i]=='I') I+=O;
	}
	return I;
}
int J[N],I[N];
int main()
{
	int n;
	scanf("%i",&n);
	scanf("%s",s+1);
	s[0]='J';s[n+1]='I';
	ll ans=max(Calc(0,n),Calc(1,n+1));
	ll tmp=Calc(1,n);
	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');
	for(int i=1;i<=n;i++) ans=max(ans,tmp+(ll)J[i]*I[i+1]);
	printf("%lld\n",ans);
	return 0;
}

Compilation message

2016_ho_t2.cpp: In function 'int main()':
2016_ho_t2.cpp:21:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i",&n);
  ~~~~~^~~~~~~~~
2016_ho_t2.cpp:22:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s",s+1);
  ~~~~~^~~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 420 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 388 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 420 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 388 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 3 ms 376 KB Output is correct
22 Correct 3 ms 376 KB Output is correct
23 Correct 3 ms 376 KB Output is correct
24 Correct 2 ms 380 KB Output is correct
25 Correct 3 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 376 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 420 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 388 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 3 ms 376 KB Output is correct
22 Correct 3 ms 376 KB Output is correct
23 Correct 3 ms 376 KB Output is correct
24 Correct 2 ms 380 KB Output is correct
25 Correct 3 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 4 ms 1272 KB Output is correct
32 Correct 4 ms 1272 KB Output is correct
33 Correct 4 ms 1280 KB Output is correct
34 Correct 4 ms 1272 KB Output is correct
35 Correct 4 ms 1272 KB Output is correct
36 Correct 6 ms 1272 KB Output is correct
37 Correct 6 ms 1276 KB Output is correct
38 Correct 6 ms 1272 KB Output is correct
39 Correct 6 ms 1272 KB Output is correct
40 Correct 6 ms 1272 KB Output is correct
41 Correct 6 ms 1312 KB Output is correct
42 Correct 5 ms 1272 KB Output is correct
43 Correct 6 ms 1272 KB Output is correct
44 Correct 5 ms 1272 KB Output is correct
45 Correct 5 ms 1272 KB Output is correct