fork download
copy 
  1. #include<iostream>
  2.  
  3. #define MaxM 1005
  4. bool painted[MaxM] = {false};
  5.  
  6. int main() {
  7.     freopen("ROBOT.INP", "r", stdin);
  8.     freopen("ROBOT.OUT", "w", stdout);
  9.  
  10.     int M, N; std::cin >> M >> N;
  11.     for(int i = 1; i <= N; ++i) {
  12.         int a, b; std::cin >> a >> b;
  13.         for(int j = a; j <= b; ++j) painted[j] = true;
  14.     }
  15.  
  16.     int res = 0;
  17.     for(int i = 1; i <= M; ++i) 
  18.         if(!painted[i]) ++res;
  19.  
  20.     std::cout << res;
  21.  
  22.     return 0;
  23. }
  24.  
Success #stdin #stdout 0s 5308KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
https://ideone.com/Fh2hvm
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!