Compilare: main.cpp: In function 'int main()': main.cpp:30:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<v.size(); i++) ~^~~~~~~~~ main.cpp:31:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=i; j<v.size(); j++) ~^~~~~~~~~ main.cpp:49:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<v.size(); i++) ~^~~~~~~~~ main.cpp:50:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=i; j<v.size(); j++) ~^~~~~~~~~ main.cpp:12:20: warning: unused variable 'c' [-Wunused-variable] llo b,a,nr=0,k,c,r,d,i,j,z; ^ main.cpp:13:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("armonica.in","r",stdin); ^ main.cpp:14:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("armonica.out","w",stdout); ^ main.cpp:15:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&b); ^