답안 #21177 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
21177	2017-04-07T13:40:04 Z	junodeveloper	스트랩 (JOI14_straps)	C++14	100 / 100	33 ms	33368 KB

straps

#include<cstdio>
#include<iostream>
#include<vector>
#include<algorithm>
#define INF (ll)2e9
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pl;
ll n,i,d[2002][2002];
pl p[2002];
vector<ll> q;
int main() {
    scanf("%lld", &n);
    for(i=1;i<=n;i++) scanf("%lld%lld", &p[i].first, &p[i].second);
    sort(p+1, p+n+1, [&](pl& a, pl& b) {
        return a.first == b.first ? a.second > b.second : a.first > b.first;
    });
    for(i=2;i<=2000;i++) d[0][i] = -INF;
    for(i=1;i<=n;i++) {
        ll a = p[i].first;
        ll b = p[i].second;
        if(!a) break;
        for(int j=2000;j>=0;j--) {
            d[i][j] = d[i-1][j];
            if(j < 2000) d[i][j] = max(d[i][j], d[i][j+1]);
            if(j - a + 1 >= 0 && d[i-1][j-a+1] != -INF)
                d[i][j] = max(d[i][j], d[i-1][j-a+1] + b);
        }
    }
    ll t = i-1;
    for(;i<=n;i++) if(p[i].second > 0) q.push_back(p[i].second);
    ll r = -INF, s = 0;
    for(i=0;i<=2000;i++) {
        r = max(r, d[t][i] + s);
        if(i < q.size()) s += q[i];
    }
    printf("%lld", r);
    return 0;
}

Compilation message

straps.cpp: In function 'int main()':
straps.cpp:35:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(i < q.size()) s += q[i];
              ^
straps.cpp:13:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld", &n);
                      ^
straps.cpp:14:67: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(i=1;i<=n;i++) scanf("%lld%lld", &p[i].first, &p[i].second);
                                                                   ^

Subtask #1
5.0 / 5.0

#	결과	메모리	Grader output
1	Correct	33368 KB	Output is correct
2	Correct	33368 KB	Output is correct
3	Correct	33368 KB	Output is correct
4	Correct	33368 KB	Output is correct
5	Correct	33368 KB	Output is correct
6	Correct	33368 KB	Output is correct
7	Correct	33368 KB	Output is correct
8	Correct	33368 KB	Output is correct
9	Correct	33368 KB	Output is correct
10	Correct	33368 KB	Output is correct
11	Correct	33368 KB	Output is correct
12	Correct	33368 KB	Output is correct
13	Correct	33368 KB	Output is correct
14	Correct	33368 KB	Output is correct
15	Correct	33368 KB	Output is correct
16	Correct	33368 KB	Output is correct
17	Correct	33368 KB	Output is correct
18	Correct	33368 KB	Output is correct
19	Correct	33368 KB	Output is correct
20	Correct	33368 KB	Output is correct
21	Correct	33368 KB	Output is correct
22	Correct	33368 KB	Output is correct
23	Correct	33368 KB	Output is correct
24	Correct	33368 KB	Output is correct
25	Correct	33368 KB	Output is correct

Subtask #2
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	33368 KB	Output is correct
2	Correct	0 ms	33368 KB	Output is correct
3	Correct	0 ms	33368 KB	Output is correct
4	Correct	0 ms	33368 KB	Output is correct
5	Correct	0 ms	33368 KB	Output is correct
6	Correct	0 ms	33368 KB	Output is correct
7	Correct	0 ms	33368 KB	Output is correct
8	Correct	3 ms	33368 KB	Output is correct
9	Correct	3 ms	33368 KB	Output is correct
10	Correct	3 ms	33368 KB	Output is correct
11	Correct	3 ms	33368 KB	Output is correct
12	Correct	9 ms	33368 KB	Output is correct
13	Correct	9 ms	33368 KB	Output is correct
14	Correct	6 ms	33368 KB	Output is correct
15	Correct	3 ms	33368 KB	Output is correct
16	Correct	0 ms	33368 KB	Output is correct
17	Correct	3 ms	33368 KB	Output is correct
18	Correct	3 ms	33368 KB	Output is correct
19	Correct	0 ms	33368 KB	Output is correct
20	Correct	0 ms	33368 KB	Output is correct
21	Correct	0 ms	33368 KB	Output is correct
22	Correct	0 ms	33368 KB	Output is correct
23	Correct	0 ms	33368 KB	Output is correct
24	Correct	0 ms	33368 KB	Output is correct
25	Correct	0 ms	33368 KB	Output is correct
26	Correct	0 ms	33368 KB	Output is correct
27	Correct	0 ms	33368 KB	Output is correct
28	Correct	0 ms	33368 KB	Output is correct
29	Correct	33 ms	33368 KB	Output is correct
30	Correct	29 ms	33368 KB	Output is correct
31	Correct	19 ms	33368 KB	Output is correct

Subtask #3
45.0 / 45.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	33368 KB	Output is correct
2	Correct	0 ms	33368 KB	Output is correct
3	Correct	0 ms	33368 KB	Output is correct
4	Correct	0 ms	33368 KB	Output is correct
5	Correct	0 ms	33368 KB	Output is correct
6	Correct	0 ms	33368 KB	Output is correct
7	Correct	0 ms	33368 KB	Output is correct
8	Correct	0 ms	33368 KB	Output is correct
9	Correct	0 ms	33368 KB	Output is correct
10	Correct	6 ms	33368 KB	Output is correct
11	Correct	3 ms	33368 KB	Output is correct
12	Correct	3 ms	33368 KB	Output is correct
13	Correct	3 ms	33368 KB	Output is correct
14	Correct	3 ms	33368 KB	Output is correct
15	Correct	0 ms	33368 KB	Output is correct
16	Correct	0 ms	33368 KB	Output is correct
17	Correct	0 ms	33368 KB	Output is correct
18	Correct	9 ms	33368 KB	Output is correct
19	Correct	3 ms	33368 KB	Output is correct
20	Correct	3 ms	33368 KB	Output is correct
21	Correct	0 ms	33368 KB	Output is correct
22	Correct	3 ms	33368 KB	Output is correct
23	Correct	3 ms	33368 KB	Output is correct
24	Correct	3 ms	33368 KB	Output is correct
25	Correct	3 ms	33368 KB	Output is correct
26	Correct	0 ms	33368 KB	Output is correct
27	Correct	0 ms	33368 KB	Output is correct
28	Correct	0 ms	33368 KB	Output is correct
29	Correct	0 ms	33368 KB	Output is correct
30	Correct	0 ms	33368 KB	Output is correct
31	Correct	0 ms	33368 KB	Output is correct
32	Correct	0 ms	33368 KB	Output is correct
33	Correct	16 ms	33368 KB	Output is correct

Subtask #4
45.0 / 45.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	33368 KB	Output is correct
2	Correct	0 ms	33368 KB	Output is correct
3	Correct	0 ms	33368 KB	Output is correct
4	Correct	0 ms	33368 KB	Output is correct
5	Correct	0 ms	33368 KB	Output is correct
6	Correct	0 ms	33368 KB	Output is correct
7	Correct	0 ms	33368 KB	Output is correct
8	Correct	0 ms	33368 KB	Output is correct
9	Correct	0 ms	33368 KB	Output is correct
10	Correct	0 ms	33368 KB	Output is correct
11	Correct	0 ms	33368 KB	Output is correct
12	Correct	0 ms	33368 KB	Output is correct
13	Correct	0 ms	33368 KB	Output is correct
14	Correct	0 ms	33368 KB	Output is correct
15	Correct	0 ms	33368 KB	Output is correct
16	Correct	0 ms	33368 KB	Output is correct
17	Correct	0 ms	33368 KB	Output is correct
18	Correct	0 ms	33368 KB	Output is correct
19	Correct	19 ms	33368 KB	Output is correct
20	Correct	16 ms	33368 KB	Output is correct
21	Correct	23 ms	33368 KB	Output is correct
22	Correct	29 ms	33368 KB	Output is correct
23	Correct	29 ms	33368 KB	Output is correct
24	Correct	26 ms	33368 KB	Output is correct
25	Correct	0 ms	33368 KB	Output is correct

답안 #21177

Compilation message

Subtask #1 5.0 / 5.0

Subtask #2 5.0 / 5.0

Subtask #3 45.0 / 45.0

Subtask #4 45.0 / 45.0

Subtask #1
5.0 / 5.0

Subtask #2
5.0 / 5.0

Subtask #3
45.0 / 45.0

Subtask #4
45.0 / 45.0