Compilare: main.cpp: In function 'int main()': main.cpp:63:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1;i<v.size();i++) v[i].val = getVal(v[i].x, v[i].y); ~^~~~~~~~~ main.cpp:65:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1;i+1<v.size();i++){ ~~~^~~~~~~~~ main.cpp:66:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=i+1;j<v.size();j++){ ~^~~~~~~~~ main.cpp:44:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("padure2.in","r",stdin); ^ main.cpp:45:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("padure2.out","w",stdout); ^