oj.uz

Submission #382831

# Submission time Handle Problem Language Result Execution time Memory
382831 2021-03-28T09:37:20 Z aris12345678 Fountain (eJOI20_fountain) C++14
30 / 100
 95 ms 5356 KB 
#include <bits/stdc++.h>
using namespace std;

const int mxN = 1e6+5;
int diam[mxN], cap[mxN], pref[mxN];

int main() {
    int n, q;
    scanf("%d%d", &n, &q);
    for(int i = 1; i <= n; i++) {
        scanf("%d%d", &diam[i], &cap[i]);
        pref[i] = cap[i]+pref[i-1];
    }
    if(is_sorted(diam+1, diam+n+1)) {
        while(q--) {
            int r, v;
            scanf("%d%d", &r, &v);
            int st = 1, en = n, ans, md;
            while(st <= en) {
                md = (st+en)/2;
                if(pref[md]-pref[r-1] < v)
                    st = md+1;
                else
                    ans = md, en = md-1;
            }
            if(pref[n]-pref[r-1] < v)
                printf("0\n");
            else
                printf("%d\n", ans);
        }
    } else {
        while(q--) {
            int r, v;
            scanf("%d%d", &r, &v);
            int ans = 0, sum = cap[r], prev = r;
            for(int i = r+1; i <= n; i++) {
                if(diam[i] > diam[prev])
                    sum += cap[i], prev = i;
                if(sum >= v) {
                    ans = prev;
                    break;
                }
            }
            if(sum >= v && r+1 > n)
                ans = r;
            printf("%d\n", ans);
        }
    }
    return 0;
}

Compilation message

fountain.cpp: In function 'int main()':
fountain.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |     scanf("%d%d", &n, &q);
      |     ~~~~~^~~~~~~~~~~~~~~~
fountain.cpp:11:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   11 |         scanf("%d%d", &diam[i], &cap[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
fountain.cpp:17:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   17 |             scanf("%d%d", &r, &v);
      |             ~~~~~^~~~~~~~~~~~~~~~
fountain.cpp:34:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   34 |             scanf("%d%d", &r, &v);
      |             ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 94 ms 5100 KB Output is correct
2 Correct 95 ms 5356 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -