Compilare: user.cpp: In function ‘bool sorting(eu, eu)’: user.cpp:13:38: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] return (a.tip<b.tip||a.tip==b.tip&&a.x<b.x); ^ user.cpp: In function ‘int main()’: user.cpp:40:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(poz<vcc[i].size()||poz1<vcc[j].size()) ^ user.cpp:40:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(poz<vcc[i].size()||poz1<vcc[j].size()) ^ user.cpp:42:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz1==vcc[j].size()||(poz<vcc[i].size()&&vcc[i][poz].x<vcc[j][poz1].x)) ^ user.cpp:42:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz1==vcc[j].size()||(poz<vcc[i].size()&&vcc[i][poz].x<vcc[j][poz1].x)) ^ user.cpp:57:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(poz=0;poz<vcc[i].size();poz++) ^ user.cpp:59:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(poz=0;poz<vcc[j].size();poz++) ^ user.cpp:18:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("carpetbomber.in","r",stdin); ^ user.cpp:19:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("carpetbomber.out","w",stdout); ^ user.cpp:20:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:22:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&v[i].tip,&v[i].x,&v[i].y); ^