Submission #361720

#	Time	Username	Problem	Language	Result	Execution time	Memory
361720		wildturtle	Lightning Rod (NOI18_lightningrod)	C++14	80 / 100	2050 ms	79972 KiB

Main

#include<bits/stdc++.h>
using namespace std;
int a,b,c,d,n;
bool l;
stack < pair <int , int > > st;
int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin>>n;
    for(int i=1;i<=n;i++) {
        cin>>a>>b;
        l=0;
        while(!st.empty()) {
            c=st.top().first;
            d=st.top().second;
            if(a+b<=c+d) { l=1; break; }
            if(a-b<=c-d) st.pop();
            else break;
        }
        if(l==0) st.push({a,b});
    }
    cout<<st.size();
}

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