답안 #153910

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
153910	2019-09-17T12:36:24 Z	arnold518	도넛 (JOI14_ho_t3)	C++14	100 / 100	193 ms	3704 KB

2014_ho_t3

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

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 1e5;

int N;
ll A[MAXN+10], S;
ll SA[MAXN+10], SB[MAXN+10];

bool decide(ll x)
{
    int i, j;

    int pa=0, pb=N-1;
    ll suma=0, sumb=0;

    for(i=0; i<N; i++)
    {
        for(; suma<x; pa=(pa+1)%N) suma+=A[pa];
        SA[i]=suma;
        suma-=A[i];
    }
    for(i=N-1; i>=0; i--)
    {
        for(; sumb<x; pb=(pb+N-1)%N) sumb+=A[pb];
        SB[i]=sumb;
        sumb-=A[i];
    }
    for(i=0; i<N; i++) if(S-SA[i]-SB[(i+N-1)%N]>=x) return true;
    return false;
}

int main()
{
    int i, j;

    scanf("%d", &N);
    for(i=0; i<N; i++) scanf("%lld", &A[i]), S+=A[i];

    ll lo=0, hi=S;
    while(lo+1<hi)
    {
        ll mid=lo+hi>>1;
        if(decide(mid)) lo=mid;
        else hi=mid;
    }
    printf("%lld", lo);
}

Compilation message

2014_ho_t3.cpp: In function 'bool decide(ll)':
2014_ho_t3.cpp:16:12: warning: unused variable 'j' [-Wunused-variable]
     int i, j;
            ^
2014_ho_t3.cpp: In function 'int main()':
2014_ho_t3.cpp:47:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
         ll mid=lo+hi>>1;
                ~~^~~
2014_ho_t3.cpp:39:12: warning: unused variable 'j' [-Wunused-variable]
     int i, j;
            ^
2014_ho_t3.cpp:41:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &N);
     ~~~~~^~~~~~~~~~
2014_ho_t3.cpp:42:44: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(i=0; i<N; i++) scanf("%lld", &A[i]), S+=A[i];
                        ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~

Subtask #1
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	376 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	364 KB	Output is correct
5	Correct	2 ms	248 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

Subtask #2
15.0 / 15.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	376 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	364 KB	Output is correct
5	Correct	2 ms	248 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	348 KB	Output is correct
14	Correct	3 ms	348 KB	Output is correct
15	Correct	2 ms	376 KB	Output is correct
16	Correct	3 ms	376 KB	Output is correct
17	Correct	3 ms	280 KB	Output is correct
18	Correct	3 ms	376 KB	Output is correct
19	Correct	3 ms	376 KB	Output is correct
20	Correct	3 ms	312 KB	Output is correct

Subtask #3
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	376 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	364 KB	Output is correct
5	Correct	2 ms	248 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	348 KB	Output is correct
14	Correct	3 ms	348 KB	Output is correct
15	Correct	2 ms	376 KB	Output is correct
16	Correct	3 ms	376 KB	Output is correct
17	Correct	3 ms	280 KB	Output is correct
18	Correct	3 ms	376 KB	Output is correct
19	Correct	3 ms	376 KB	Output is correct
20	Correct	3 ms	312 KB	Output is correct
21	Correct	11 ms	504 KB	Output is correct
22	Correct	11 ms	632 KB	Output is correct
23	Correct	11 ms	504 KB	Output is correct
24	Correct	11 ms	504 KB	Output is correct
25	Correct	11 ms	504 KB	Output is correct
26	Correct	16 ms	632 KB	Output is correct
27	Correct	16 ms	640 KB	Output is correct
28	Correct	16 ms	632 KB	Output is correct
29	Correct	17 ms	760 KB	Output is correct
30	Correct	17 ms	640 KB	Output is correct
31	Correct	10 ms	504 KB	Output is correct
32	Correct	10 ms	504 KB	Output is correct
33	Correct	10 ms	504 KB	Output is correct
34	Correct	10 ms	500 KB	Output is correct
35	Correct	10 ms	504 KB	Output is correct

Subtask #4
50.0 / 50.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	376 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	364 KB	Output is correct
5	Correct	2 ms	248 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	348 KB	Output is correct
14	Correct	3 ms	348 KB	Output is correct
15	Correct	2 ms	376 KB	Output is correct
16	Correct	3 ms	376 KB	Output is correct
17	Correct	3 ms	280 KB	Output is correct
18	Correct	3 ms	376 KB	Output is correct
19	Correct	3 ms	376 KB	Output is correct
20	Correct	3 ms	312 KB	Output is correct
21	Correct	11 ms	504 KB	Output is correct
22	Correct	11 ms	632 KB	Output is correct
23	Correct	11 ms	504 KB	Output is correct
24	Correct	11 ms	504 KB	Output is correct
25	Correct	11 ms	504 KB	Output is correct
26	Correct	16 ms	632 KB	Output is correct
27	Correct	16 ms	640 KB	Output is correct
28	Correct	16 ms	632 KB	Output is correct
29	Correct	17 ms	760 KB	Output is correct
30	Correct	17 ms	640 KB	Output is correct
31	Correct	10 ms	504 KB	Output is correct
32	Correct	10 ms	504 KB	Output is correct
33	Correct	10 ms	504 KB	Output is correct
34	Correct	10 ms	500 KB	Output is correct
35	Correct	10 ms	504 KB	Output is correct
36	Correct	188 ms	3688 KB	Output is correct
37	Correct	188 ms	3576 KB	Output is correct
38	Correct	192 ms	3668 KB	Output is correct
39	Correct	191 ms	3652 KB	Output is correct
40	Correct	188 ms	3704 KB	Output is correct
41	Correct	190 ms	3676 KB	Output is correct
42	Correct	188 ms	3676 KB	Output is correct
43	Correct	189 ms	3676 KB	Output is correct
44	Correct	188 ms	3704 KB	Output is correct
45	Correct	193 ms	3704 KB	Output is correct
46	Correct	99 ms	2936 KB	Output is correct
47	Correct	98 ms	2908 KB	Output is correct
48	Correct	98 ms	2912 KB	Output is correct

답안 #153910

Compilation message

Subtask #1 5.0 / 5.0

Subtask #2 15.0 / 15.0

Subtask #3 30.0 / 30.0

Subtask #4 50.0 / 50.0

Subtask #1
5.0 / 5.0

Subtask #2
15.0 / 15.0

Subtask #3
30.0 / 30.0

Subtask #4
50.0 / 50.0