Submission #299898

#	Time	Username	Problem	Language	Result	Execution time	Memory
299898		ly20	Olympiads (BOI19_olympiads)	C++17	44 / 100	2083 ms	17936 KiB

olympiads

#include <bits/stdc++.h>
using namespace std;
const int MAXN = 510;
int n, k, c;
int val[MAXN][MAXN];
vector <int> at;
int mx[MAXN];
bool ok[MAXN];
void bk(int l, int a) {
    if(n - a < l) return;
    if(l == 0) {
        for(int i = 0; i < k; i++) {
            mx[i] = 0;
        }
        for(int i = 0; i < n; i++) {
            if(ok[i]) {
                    //printf("%d ", i);
                for(int j = 0; j < k; j++) mx[j] = max(mx[j], val[i][j]);
            }
        }
        //printf("\n");
        int resp = 0;
        for(int i = 0; i < k; i++) {
            resp += mx[i];
        }
        at.push_back(resp);
        return;
    }
    if(a == n) return;
    ok[a] = 1;
    bk(l - 1, a + 1);
    ok[a] = 0;
    bk(l, a + 1);
}
bool cmp(int a, int b) {
    return a > b;
}
int main() {
    scanf("%d %d %d", &n, &k, &c);
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < k; j++) {
            scanf("%d", &val[i][j]);
            mx[j] = max(mx[j], val[i][j]);
        }
    }
    bk(k, 0);
    sort(at.begin(), at.end(), cmp);
    printf("%d\n", at[c - 1]);
    return 0;
}

Compilation message (stderr)

olympiads.cpp: In function 'int main()':
olympiads.cpp:39:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   39 |     scanf("%d %d %d", &n, &k, &c);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
olympiads.cpp:42:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   42 |             scanf("%d", &val[i][j]);
      |             ~~~~~^~~~~~~~~~~~~~~~~~

• Subtask 1: 13 / 13
• Subtask 2: 31 / 31
• Subtask 3: 0 / 24
• Subtask 4: 0 / 32