Compilare: user.cpp: In function ‘int Solve(int)’: user.cpp:11:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, cnt = 1; ^ user.cpp: In function ‘int main()’: user.cpp:31:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, x, y; ^ user.cpp:33:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (scanf("%d", &T); T; --T) { ^ user.cpp:34:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &M); ^ user.cpp:36:47: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &V[i][0], &V[i][1]); ^ user.cpp:37:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &x, &y); ^