Assigning a Meeting Room

#include<iostream> #define N 20; int a[501][3]; using namespace std; void swap(int a, int b) { int temp = a; a = b; b = temp; } int main() { freopen("input.txt","r",stdin); int n,T ; cin >> T; for(int tc = 1; tc<=T; tc++) { cin >> n; for(int i = 0; i < n; i++) { for(int j = 0; j <3; j++) { cin >> a[i][j]; //cout << a[i][j] << " "; } //cout << endl; } for(int i = 0; i< n-1; i++) { for(int j = i+1; j < n; j++) if(a[j][2] < a[i][2]) { int t1 = a[j][1]; a[j][1] = a[i][1]; a[i][1] = t1; int t2 = a[j][2]; a[j][2] = a[i][2]; a[i][2] = t2; } } int kq=1; int t = a[0][2]; for(int i = 1; i < n; i++) { if(a[i][1]>=t) { kq++; t = a[i][2]; } } cout <<"Case #"<<tc<<endl<< kq<<endl; } return 0; }