Submission #416266

#	Time	Username	Problem	Language	Result	Execution time	Memory
416266		strawberry2005	Lightning Rod (NOI18_lightningrod)	C++17	100 / 100	776 ms	175988 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;
}

int readInt()
{
    int x = 0;
    char ch = getchar_unlocked();
    while (ch < '0' || ch > '9') ch = getchar_unlocked();
    while (ch >= '0' && ch <= '9'){
        x = (x << 3) + (x << 1) + ch - '0';
        ch = getchar_unlocked();
    }
    return x;
}

signed main(){

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

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

    int n=readInt();
    stack<pair<int,int>> s;
    for(int i=0;i<n;i++){
        int x=readInt(),y=readInt();

        while(!s.empty()&&abs(x-s.top().F)<=y-s.top().S){
            s.pop();
        }
        if(s.empty()||abs(x-s.top().F)>s.top().S-y) s.push({x,y});
        
    }
    printf("%d",s.size());


    return(0);
    
}

Compilation message (stderr)

lightningrod.cpp: In function 'int main()':
lightningrod.cpp:54:14: 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=]
   54 |     printf("%d",s.size());
      |             ~^  ~~~~~~~~
      |              |        |
      |              int      std::stack<std::pair<int, int> >::size_type {aka long unsigned int}
      |             %ld

• 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: 20 / 20