Compilare: main.cpp: In function 'void add(int, int, int)': main.cpp:72:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = o; i <= a[no].size()-1; i += zeros(i)) ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void citeste(int&)': main.cpp:22:46: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,DIM,stdin),poza=0; ^ main.cpp:28:46: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,DIM,stdin),poza=0; ^ main.cpp: In function 'int main()': main.cpp:120:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pandemie.in","r",stdin); ^ main.cpp: In function 'int solve(int)': main.cpp:101:12: warning: 'last' may be used uninitialized in this function [-Wmaybe-uninitialized] int j, last, nu; ^~~~