Submission #129951

#	Time	Username	Problem	Language	Result	Execution time	Memory
129951		arnold518	Sure Bet (CEOI17_sure)	C++14	100 / 100	78 ms	3596 KiB

sure

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 1e5;

int N;
double A[MAXN+10], B[MAXN+10], ans;

int main()
{
    int i, j;

    scanf("%d", &N);
    for(i=1; i<=N; i++) scanf("%lf%lf", &A[i], &B[i]);
    sort(A+1, A+N+1, greater<double>());
    sort(B+1, B+N+1, greater<double>());

    int pa=1, pb=1;
    double asum=0, bsum=0;
    while(pa<=N || pb<=N)
    {
        if(pb>N || (pa<=N && asum<bsum)) asum+=A[pa++];
        else bsum+=B[pb++];
        ans=max(ans, min(asum-pa-pb+2, bsum-pa-pb+2));
    }
    printf("%.4f", ans);
}

Compilation message (stderr)

sure.cpp: In function 'int main()':
sure.cpp:15:12: warning: unused variable 'j' [-Wunused-variable]
     int i, j;
            ^
sure.cpp:17:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &N);
     ~~~~~^~~~~~~~~~
sure.cpp:18:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(i=1; i<=N; i++) scanf("%lf%lf", &A[i], &B[i]);
                         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 40 / 40