Submission #559801

#	Time	Username	Problem	Language	Result	Execution time	Memory
559801		krit3379	Safety (NOI18_safety)	C++17	100 / 100	56 ms	5380 KiB

safety

#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#define N 200005
typedef long long ll;

ll x,h,shift,ymin;
priority_queue<ll> l;
priority_queue<ll,vector<ll>,greater<ll>> r;

int main(){
    int n;
    scanf("%d %lld",&n,&h);
    scanf("%lld",&x);
    l.push(x),r.push(x);
    while(--n){
        scanf("%lld",&x);
        shift+=h;
        if(x<l.top()-shift){
            ymin+=l.top()-shift-x;
            r.push(l.top()-2*shift);
            l.pop();
            l.push(x+shift);
            l.push(x+shift);
        }
        else if(x>r.top()+shift){
            ymin+=x-r.top()-shift;
            l.push(r.top()+2*shift);
            r.pop();
            r.push(x-shift);
            r.push(x-shift);
        }
        else{
            l.push(x+shift);
            r.push(x-shift);
        }
    }
    printf("%lld",ymin);
    return 0;
}

Compilation message (stderr)

safety.cpp: In function 'int main()':
safety.cpp:14:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |     scanf("%d %lld",&n,&h);
      |     ~~~~~^~~~~~~~~~~~~~~~~
safety.cpp:15:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     scanf("%lld",&x);
      |     ~~~~~^~~~~~~~~~~
safety.cpp:18:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         scanf("%lld",&x);
      |         ~~~~~^~~~~~~~~~~

• Subtask 1: 3 / 3
• Subtask 2: 4 / 4
• Subtask 3: 9 / 9
• Subtask 4: 5 / 5
• Subtask 5: 6 / 6
• Subtask 6: 11 / 11
• Subtask 7: 11 / 11
• Subtask 8: 22 / 22
• Subtask 9: 29 / 29