Compilare: main.cpp: In function 'int add(int, int)': main.cpp:19:8: warning: no return statement in function returning non-void [-Wreturn-type] u[y]=x;} ^ main.cpp: In function 'int calc()': main.cpp:32:23: warning: no return statement in function returning non-void [-Wreturn-type] tata[findt(it)]=nod;}}} ^ main.cpp: In function 'int dfs1(int)': main.cpp:37:22: warning: no return statement in function returning non-void [-Wreturn-type] w[nod]=w[nod]+w[it];}} ^ main.cpp: In function 'int dfs2(int)': main.cpp:44:10: warning: no return statement in function returning non-void [-Wreturn-type] dfs2(it);} ^ main.cpp: In function 'int main()': main.cpp:48:7: warning: unused variable 'j' [-Wunused-variable] int i,j; ^ main.cpp:46:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("djok.in","r",stdin); ^ main.cpp:47:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("djok.out","w",stdout); ^ main.cpp:49:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ main.cpp:51:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^ main.cpp:54:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^