Submission #970511

#	Time	Username	Problem	Language	Result	Execution time	Memory
970511		NoMercy	Lightning Rod (NOI18_lightningrod)	C++14	66 / 100	2037 ms	43256 KiB

Main

#include <bits/stdc++.h>
using namespace std;
 
    
int TIME = clock();

#define file \
            freopen("in.txt" , "r" , stdin); \
            freopen("out.txt" , "w" , stdout);
 

void test_case () {
    int n;
    cin >> n;
    stack<pair<int , int>> st;
    
    for (int i = 0;i < n;i ++) {
        int x , y;
        cin >> x >> y;
        pair<int , int> tmp = {x , y};
        if (st.size() == 0) {
            st.push({x , y});
            continue;
        }
        if (abs(x - st.top().first) <= st.top().second - y) {
            continue;
        }
        while ((int)st.size() > 0 && abs(st.top().first - x) <= y - st.top().second) {
            st.pop();
        }
        st.push({x , y});
    }
    cout << (int)st.size() << "\n";
}

 
int32_t main () {
 
    ///    file
    
 
    int t = 1;
    // cin >> t;
 
    while (t --) {
        test_case();
    }

    return 0;
}

Compilation message (stderr)

lightningrod.cpp: In function 'void test_case()':
lightningrod.cpp:20:25: warning: variable 'tmp' set but not used [-Wunused-but-set-variable]
   20 |         pair<int , int> tmp = {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