Compilare: main.cpp: In function 'void mo(int)': main.cpp:55:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0 ; j < bucket[x].size() ; j++) { ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:92:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<q.size(); i++) ~^~~~~~~~~ main.cpp:79:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rangemode.in","r",stdin); ^ main.cpp:80:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rangemode.out","w",stdout); ^ main.cpp:81:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ main.cpp:83:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^ main.cpp:86:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^