답안 #146749

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
146749	2019-08-25T21:39:57 Z	TadijaSebez	스탬프 수집 (JOI16_ho_t2)	C++11	100 / 100	6 ms	1312 KB

2016_ho_t2

#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

#	결과	실행 시간	메모리	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

#	결과	실행 시간	메모리	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

#	결과	실행 시간	메모리	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