Submission #25191

#	Time	Username	Problem	Language	Result	Execution time	Memory
25191		junodeveloper	스트랩 (JOI14_straps)	C++14	100 / 100	13 ms	17692 KiB

straps

#include<cstdio>
#include<iostream>
#include<vector>
#include<algorithm>
#define INF (int)2e9
using namespace std;
int e[2002][2002];
pair<int, int> p[2002];
int main() {
    int n, i;
    scanf("%d", &n);
    for (i = 1; i <= n; i++) {
        scanf("%d%d", &p[i].first, &p[i].second);
        p[i].first *= -1;
        p[i].second *= -1;
    }
    sort(p + 1, p + n + 1);
    for (i = 2; i <= n; i++) e[0][i] = -INF;
    for (i = 1; i <= n; i++) {
        int a = -p[i].first;
        int b = -p[i].second;
        if (!a) break;
        for (int j = n; j >= 0; j--) {
            e[i][j] = e[i - 1][j];
            int t = max(0, j - a + 1);
            if (e[i - 1][t] != -INF)
                e[i][j] = max(e[i][j], e[i - 1][t] + b);
        }
    }
    int last = i - 1;
    vector<int> v;
    for (; i <= n; i++)
        if (-p[i].second > 0) v.push_back(-p[i].second);
    int res = -INF, sum = 0;
    for (i = 0; i <= n; i++) {
        res = max(res, e[last][i] + sum);
        if (i < v.size()) sum += v[i];
    }
    printf("%d", res);
    return 0;
}

Compilation message (stderr)

straps.cpp: In function 'int main()':
straps.cpp:37:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if (i < v.size()) sum += v[i];
               ^
straps.cpp:11:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
                    ^
straps.cpp:13:49: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &p[i].first, &p[i].second);
                                                 ^

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 45 / 45
• Subtask 4: 45 / 45