Compilare: user.cpp: In function ‘int main()’: user.cpp:33:12: warning: unused variable ‘t’ [-Wunused-variable] int n, i, t, nr=0, sum, k, L, R; ^ user.cpp:33:21: warning: unused variable ‘sum’ [-Wunused-variable] int n, i, t, nr=0, sum, k, L, R; ^ user.cpp:35:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ user.cpp:38:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &v[i].first, &v[i].second); ^