#include<iostream> using namespace std; int main() { int T, n; cin >> T; while (T--) { cin >> n; int flag = 1; int l, r; cin >> l; cin >> r; int temp = r - l; while (--n) { cin >> l; cin >> r; int out = r - 1; if (out != temp) { flag = 0; } } if (flag == 0) { cout << "NO\n"; } else { cout << "YES\n"; } } getchar(); } /* Main.c:1:9: fatal error: iostream: No such file or directory #include<iostream> ^~~~~~~~~~ compilation terminated. */ |
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