Compilare: user.cpp: In function ‘void sortare(int)’: user.cpp:27:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( i = 0; i < v[ k ].size(); ++i ){ ^ user.cpp: In function ‘int main()’: user.cpp:41:18: warning: unused variable ‘j’ [-Wunused-variable] int n, m, i, j, x, y, s, t; ^ user.cpp:41:27: warning: unused variable ‘s’ [-Wunused-variable] int n, m, i, j, x, y, s, t; ^ user.cpp:41:30: warning: unused variable ‘t’ [-Wunused-variable] int n, m, i, j, x, y, s, t; ^ user.cpp:38:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sortaret.in","r",stdin); ^ user.cpp:39:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sortaret.out","w",stdout); ^ user.cpp:43:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:45:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^