Submission #970508

#	Time	Username	Problem	Language	Result	Execution time	Memory
970508		NoMercy	Lightning Rod (NOI18_lightningrod)	C++17	0 / 100	2065 ms	1948 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 <array <int , 2>> st;
    
    for (int i = 0;i < n;i ++) {
        int x , y;
        cin >> x >> y;
        array<int , 2> tmp = {x , y};
        if (st.size() == 0) {
            st.push({x , y});
            continue;
        }
        if (abs(x - st.top()[0]) <= st.top()[0] - y) {
            continue;
        }
        while ((int)st.size() > 0 && abs(st.top()[0] - x) <= y - st.top()[1]) {
            st.pop();
        }
        st.push({x , y});
    }
    cout << 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:20:24: warning: unused variable 'tmp' [-Wunused-variable]
   20 |         array<int , 2> tmp = {x , y};
      |                        ^~~

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