Compilare: main.cpp: In function 'int main()': main.cpp:55:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<v.size();++k) ~^~~~~~~~~ main.cpp:33:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("lacuri.in","r",stdin); ^ main.cpp:34:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("lacuri.out","w",stdout); ^ main.cpp:38:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:41:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&lac[i][j]); ^