Submission #605081

#	Time	Username	Problem	Language	Result	Execution time	Memory
605081		krit3379	Balloons (CEOI11_bal)	C++17	100 / 100	141 ms	5420 KiB

bal

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

long double x,r;
stack<pair<long double,long double>> st;

int main(){
    int n,i;
    scanf("%d",&n);
    for(i=1;i<=n;i++)
    for(i=1;i<=n;i++){
        scanf("%Lf %Lf",&x,&r);
        while(!st.empty()){
            auto [x1,r1]=st.top();
            r=min(r,(x-x1)*(x-x1)/4/r1);
            if(r>=r1)st.pop();
            else break;
        }
        st.push({x,r});
        printf("%.3Lf\n",r);
    }
    return 0;
}

Compilation message (stderr)

bal.cpp: In function 'int main()':
bal.cpp:12:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
bal.cpp:15:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |         scanf("%Lf %Lf",&x,&r);
      |         ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10