Submission #1110174

#	Time	Username	Problem	Language	Result	Execution time	Memory
1110174		vjudge1	Fish 3 (JOI24_fish3)	C++17	0 / 100	1428 ms	4984 KiB

Main

#include<bits/stdc++.h>
using namespace std;
int n,d;
long long a[5000];
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    if(fopen("c.INP","r")){
        freopen("c.INP","r",stdin);
        freopen("c.OUT","w",stdout);
    }
    cin >>n>>d;
    for(int i=1;i<=n;i++){
        cin >>a[i];
    }
    int q;
    cin >>q;
    while(q--){
        int l,r;
        cin >>l>>r;
        long long lst=a[r];
        long long c=0;
        bool t=true;
        for(int i=r-1;i>=l;i--){
            if(a[i]>lst){
                if(a[i]%d>lst){
                    t=false;
                    break;
                }
                long long g=(a[i]-lst-1)/d+1;
                lst=a[i]-g*d;
                c+=g;
            }
            else lst=a[i];
        }
        if(t)cout <<c<<'\n';
        else cout<<-1<<'\n';
    }
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:10:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |         freopen("c.INP","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~
Main.cpp:11:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |         freopen("c.OUT","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 7
• Subtask 3: 0 / 28
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36