Compilare: main.cpp: In function 'int main()': main.cpp:16:42: warning: suggest parentheses around assignment used as truth value [-Wparentheses] for(i=e[l++],t=g[i].size(),v[i]=j=0;j<t&&!k;++j) ~^~ main.cpp:19:19: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(!v[g[i][j]]) ^ main.cpp:10:98: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bellmanford.in","r",stdin),freopen("bellmanford.out","w",stdout),scanf("%d%d",&n,&m); ^ main.cpp:10:98: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:10:98: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:12:69: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&i,&j,&k),g[i].push_back(j),h[i].push_back(k); ^