Compilare: user.cpp: In function ‘void compute_diff()’: user.cpp:63:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i < aux.size(); i++) { ^ user.cpp: In function ‘void compute_sa()’: user.cpp:96:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i < aux.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:116:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tetris2.in","r",stdin); ^ user.cpp:117:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tetris2.out","w",stdout); ^ user.cpp:119:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:122:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &A[i][j]); ^ user.cpp:124:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &m); ^ user.cpp:127:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &A[i][j + n]); ^