Compilare: main.cpp: In function 'int main()': main.cpp:38:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(oi[i].size()>i) jbegin=oi[i].size()-i-1; ~~~~~~~~~~~~^~ main.cpp:39:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=jbegin;j<oi[i].size();j++) ~^~~~~~~~~~~~~ main.cpp:41:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(sol.size()<=i) ~~~~~~~~~~^~~ main.cpp:56:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size();i++) {s+=sol[i];} ~^~~~~~~~~~~ main.cpp:15:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("lupu.in","r",stdin); ^ main.cpp:16:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("lupu.out","w",stdout); ^ main.cpp:22:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%i %i %i",&n,&x,&l); ^ main.cpp:26:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%i %i",&d,&v); ^