Compilare: main.cpp: In function 'int main()': main.cpp:32:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v.size();++i) ~^~~~~~~~~ main.cpp:33:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v.size();++j) ~^~~~~~~~~ main.cpp:34:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<v.size();++k) ~^~~~~~~~~ main.cpp:38:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v.size()-2;++i) ~^~~~~~~~~~~ main.cpp:39:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=i+1;j<v.size()-1;++j) ~^~~~~~~~~~~ main.cpp:40:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=j+1;k<v.size();++k) ~^~~~~~~~~ main.cpp:22:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("patrulatere.in","r",stdin); ^ main.cpp:23:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("patrulatere.out","w",stdout); ^ main.cpp:25:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:28:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^