Submission #719495

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
719495	2023-04-06T06:12:00 Z	keisuke6	Strange Device (APIO19_strange_device)	C++14	Compilation error	0 ms	0 KB

strange_device

#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
  int N,A,B;
  cin>>N>>A>>B;
  B++;
  int g = gcd(A,B);
  B--;
  int p = 0;
  if(1.0*A*B/g >= 4e18) p = 2e18;
  else p = A*B/g;
  map<int,int> m;
  for(int i=0;i<N;i++){
    int l,r;
    cin>>l>>r;
    if(l == r){
      l %= p;
      r %= p;
      m[l]++;
      m[r+1]--;
      continue;
    }
    l %= p;
    r %= p;
    if(l >= r){
      m[l]++;
      m[p]--;
      m[0]++;
      m[r+1]--;
    }
    else{
      m[l]++;
      m[r+1]--;
    }
  }
  vector<pair<int,int>> S = {};
  for(auto x:m) S.push_back(x);
  sort(S.begin(),S.end());
  int now = S[0].second;
  int ans = 0;
  for(int i=1;i<S.size();i++){
    if(now){
      ans += S[i].first-S[i-1].first;
    }
    now += S[i].second;
  }
  cout<<ans<<endl;
}

Compilation message

strange_device.cpp: In function 'int main()':
strange_device.cpp:8:11: error: 'gcd' was not declared in this scope
    8 |   int g = gcd(A,B);
      |           ^~~
strange_device.cpp:42:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |   for(int i=1;i<S.size();i++){
      |               ~^~~~~~~~~