답안 #153907

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
153907	2019-09-17T12:33:01 Z	arnold518	도넛 (JOI14_ho_t3)	C++14	100 / 100	241 ms	4004 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;

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

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

    vector<ll> SA(N), SB(N);
    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:15:12: 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	12 ms	376 KB	Output is correct
3	Correct	2 ms	256 KB	Output is correct
4	Correct	2 ms	256 KB	Output is correct
5	Correct	2 ms	256 KB	Output is correct
6	Correct	2 ms	376 KB	Output is correct
7	Correct	2 ms	256 KB	Output is correct
8	Correct	2 ms	256 KB	Output is correct
9	Correct	6 ms	376 KB	Output is correct
10	Correct	2 ms	256 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	12 ms	376 KB	Output is correct
3	Correct	2 ms	256 KB	Output is correct
4	Correct	2 ms	256 KB	Output is correct
5	Correct	2 ms	256 KB	Output is correct
6	Correct	2 ms	376 KB	Output is correct
7	Correct	2 ms	256 KB	Output is correct
8	Correct	2 ms	256 KB	Output is correct
9	Correct	6 ms	376 KB	Output is correct
10	Correct	2 ms	256 KB	Output is correct
11	Correct	3 ms	376 KB	Output is correct
12	Correct	2 ms	376 KB	Output is correct
13	Correct	3 ms	256 KB	Output is correct
14	Correct	3 ms	256 KB	Output is correct
15	Correct	10 ms	376 KB	Output is correct
16	Correct	3 ms	256 KB	Output is correct
17	Correct	4 ms	376 KB	Output is correct
18	Correct	3 ms	376 KB	Output is correct
19	Correct	3 ms	256 KB	Output is correct
20	Correct	3 ms	376 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	12 ms	376 KB	Output is correct
3	Correct	2 ms	256 KB	Output is correct
4	Correct	2 ms	256 KB	Output is correct
5	Correct	2 ms	256 KB	Output is correct
6	Correct	2 ms	376 KB	Output is correct
7	Correct	2 ms	256 KB	Output is correct
8	Correct	2 ms	256 KB	Output is correct
9	Correct	6 ms	376 KB	Output is correct
10	Correct	2 ms	256 KB	Output is correct
11	Correct	3 ms	376 KB	Output is correct
12	Correct	2 ms	376 KB	Output is correct
13	Correct	3 ms	256 KB	Output is correct
14	Correct	3 ms	256 KB	Output is correct
15	Correct	10 ms	376 KB	Output is correct
16	Correct	3 ms	256 KB	Output is correct
17	Correct	4 ms	376 KB	Output is correct
18	Correct	3 ms	376 KB	Output is correct
19	Correct	3 ms	256 KB	Output is correct
20	Correct	3 ms	376 KB	Output is correct
21	Correct	11 ms	504 KB	Output is correct
22	Correct	11 ms	504 KB	Output is correct
23	Correct	12 ms	548 KB	Output is correct
24	Correct	9 ms	504 KB	Output is correct
25	Correct	12 ms	508 KB	Output is correct
26	Correct	17 ms	504 KB	Output is correct
27	Correct	16 ms	504 KB	Output is correct
28	Correct	16 ms	504 KB	Output is correct
29	Correct	17 ms	508 KB	Output is correct
30	Correct	17 ms	588 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	504 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	12 ms	376 KB	Output is correct
3	Correct	2 ms	256 KB	Output is correct
4	Correct	2 ms	256 KB	Output is correct
5	Correct	2 ms	256 KB	Output is correct
6	Correct	2 ms	376 KB	Output is correct
7	Correct	2 ms	256 KB	Output is correct
8	Correct	2 ms	256 KB	Output is correct
9	Correct	6 ms	376 KB	Output is correct
10	Correct	2 ms	256 KB	Output is correct
11	Correct	3 ms	376 KB	Output is correct
12	Correct	2 ms	376 KB	Output is correct
13	Correct	3 ms	256 KB	Output is correct
14	Correct	3 ms	256 KB	Output is correct
15	Correct	10 ms	376 KB	Output is correct
16	Correct	3 ms	256 KB	Output is correct
17	Correct	4 ms	376 KB	Output is correct
18	Correct	3 ms	376 KB	Output is correct
19	Correct	3 ms	256 KB	Output is correct
20	Correct	3 ms	376 KB	Output is correct
21	Correct	11 ms	504 KB	Output is correct
22	Correct	11 ms	504 KB	Output is correct
23	Correct	12 ms	548 KB	Output is correct
24	Correct	9 ms	504 KB	Output is correct
25	Correct	12 ms	508 KB	Output is correct
26	Correct	17 ms	504 KB	Output is correct
27	Correct	16 ms	504 KB	Output is correct
28	Correct	16 ms	504 KB	Output is correct
29	Correct	17 ms	508 KB	Output is correct
30	Correct	17 ms	588 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	504 KB	Output is correct
35	Correct	10 ms	504 KB	Output is correct
36	Correct	239 ms	3668 KB	Output is correct
37	Correct	235 ms	3824 KB	Output is correct
38	Correct	241 ms	3788 KB	Output is correct
39	Correct	236 ms	3704 KB	Output is correct
40	Correct	231 ms	3656 KB	Output is correct
41	Correct	238 ms	4004 KB	Output is correct
42	Correct	234 ms	3752 KB	Output is correct
43	Correct	232 ms	3776 KB	Output is correct
44	Correct	229 ms	3656 KB	Output is correct
45	Correct	232 ms	3676 KB	Output is correct
46	Correct	123 ms	3056 KB	Output is correct
47	Correct	124 ms	2888 KB	Output is correct
48	Correct	127 ms	3012 KB	Output is correct

답안 #153907

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