tony_norman @ 2024-01-31 11:48:51

by kotoamatsukami @ 2024-01-31 17:16:55

聪明的你一定可以理解

include<iostream>

using namespace std; int main(){ int a[10001]={0},x,m,l,r,sum=0; cin>>m>>x; for(int i=1;i<=x;i++){ cin>>l>>r; for(int j=l;j<=r;j++){ a[j]=-1; } } for(int i=0;i<=m;i++){ if(a[i]==0){ sum++; } } cout<<sum; return 0; }