Submission #416263

#	Time	Username	Problem	Language	Result	Execution time	Memory
416263		strawberry2005	Lightning Rod (NOI18_lightningrod)	C++17	4 / 100	2015 ms	79808 KiB

Main

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

//#define int long long
#define pb push_back
#define F first
#define S second
#define mp make_pair
#define nl '\n'
const int mod = 1e9+7;
#define deb(x) cout<<#x<<": "<<x<<endl

int iceil(int a, int b) {
  return (a + b - 1) / b;
}
int mod_fun(int a, int mod){
  while(a < 0) a += mod;
  return a % mod;
}

signed main(){

    #ifdef strawberryshaker2005
        freopen("input.txt", "r", stdin);
    #endif

    //ios_base::sync_with_stdio(false);
    //cin.tie(NULL);
    //cout.tie(NULL);

    int n;
    scanf("%d",&n);
    stack<pair<int,int>> s;
    for(int i=0;i<n;i++){
        int x,y,add=1;
        scanf("%d %d",&x,&y);
        while(!s.empty()&&abs(x-s.top().F)<=y-s.top().S){
            s.pop();
        }
        if(s.empty()||abs(x-s.top().F)>y-s.top().S) s.push({x,y});
        
    }
    printf("%d",s.size());


    return(0);
    
}

Compilation message (stderr)

lightningrod.cpp: In function 'int main()':
lightningrod.cpp:35:17: warning: unused variable 'add' [-Wunused-variable]
   35 |         int x,y,add=1;
      |                 ^~~
lightningrod.cpp:43:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::stack<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wformat=]
   43 |     printf("%d",s.size());
      |             ~^  ~~~~~~~~
      |              |        |
      |              int      std::stack<std::pair<int, int> >::size_type {aka long unsigned int}
      |             %ld
lightningrod.cpp:32:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
lightningrod.cpp:36:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |         scanf("%d %d",&x,&y);
      |         ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 4 / 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