Compilare: user.cpp: In function ‘void dj(int)’: user.cpp:31:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<g[k].size();j++) ^ user.cpp:39:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<g[k].size();j++) ^ user.cpp: In function ‘void apm()’: user.cpp:48:8: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(!a[i]) ^ user.cpp: In function ‘int main()’: user.cpp:58:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ubuntzei.in","r",stdin); ^ user.cpp:59:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ubuntzei.out","w",stdout); ^ user.cpp:60:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&K); ^ user.cpp:61:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=K;i++) scanf("%d",&L[i]); ^ user.cpp:64:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x,&y,&c); ^