Compilare: main.cpp: In function 'int main()': main.cpp:73:39: warning: suggest parentheses around assignment used as truth value [-Wparentheses] while(new_flow = BFS(source , sink)) ^ main.cpp:61:11: warning: unused variable 'j' [-Wunused-variable] int i,j,x,c,y; ^ main.cpp:59:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("maxflow.in" , "r" , stdin); ^ main.cpp:60:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("maxflow.out" , "w", stdout); ^ main.cpp:62:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&N,&M); ^ main.cpp:66:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x,&y,&c); ^