Submission #535795

#	Time	Username	Problem	Language	Result	Execution time	Memory
535795		79brue	Worst Reporter 3 (JOI18_worst_reporter3)	C++14	100 / 100	754 ms	33300 KiB

worst_reporter3

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int n, q;
ll arr[500002];
ll ta[500002], len[500002];

int calc(ll t, ll x){
    int l = 0, r = n, ans = -1;
    while(l <= r){
        int m = (l+r)>>1;
        if((t / ta[m]) * len[m] - m >= x){
            ans = m;
            l = m+1;
        }
        else r = m-1;
    }
    return ans;
}

int main(){
    scanf("%d %d", &n, &q);
    for(int i=1; i<=n; i++) scanf("%lld", &arr[i]);

    ta[0] = 1, len[0] = 1;
    for(int i=1; i<=n; i++){
        ta[i] = ta[i-1] * ((arr[i] + len[i-1] - 1) / len[i-1]);
        len[i] = ta[i] / ta[i-1] * len[i-1];
    }

    while(q--){
        ll t, l, r;
        scanf("%lld %lld %lld", &t, &l, &r);
        printf("%d\n", calc(t, l) - calc(t, r+1));
    }
}

Compilation message (stderr)

worst_reporter3.cpp: In function 'int main()':
worst_reporter3.cpp:25:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |     scanf("%d %d", &n, &q);
      |     ~~~~~^~~~~~~~~~~~~~~~~
worst_reporter3.cpp:26:34: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |     for(int i=1; i<=n; i++) scanf("%lld", &arr[i]);
      |                             ~~~~~^~~~~~~~~~~~~~~~~
worst_reporter3.cpp:36:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |         scanf("%lld %lld %lld", &t, &l, &r);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 12 / 12
• Subtask 3: 81 / 81