Submission #227646

#	Time	Username	Problem	Language	Result	Execution time	Memory
227646		Autoratch	Lightning Rod (NOI18_lightningrod)	C++14	66 / 100	2092 ms	72476 KiB

Main

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

int n,x,y;
stack<pair<int,int> > a;

int main()
{
    scanf("%d",&n);
    for(int i = 0;i < n;i++)
    {
        scanf("%d%d",&x,&y);
        while(!a.empty() and abs(a.top().first-x)<=y-a.top().second) a.pop();
        if(a.empty() or abs(a.top().first-x)>a.top().second-y) a.push({x,y});
    }
    printf("%d",(int)a.size());
}

Compilation message (stderr)

lightningrod.cpp: In function 'int main()':
lightningrod.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
lightningrod.cpp:12:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&x,&y);
         ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 0 / 4
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 21 / 21
• Subtask 5: 26 / 26
• Subtask 6: 0 / 10
• Subtask 7: 0 / 20