Submission #1413767

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Source Code Expand

#include<cstdio>
#include<algorithm>
#include<cstring>
#define maxn 200050
#define add(u,v) (to[++top]=head[u],head[u]=top,w[top]=v)
#define For(x) for(int h=head[x],o=w[h];h;o=w[h=to[h]])
using namespace std;
int n,m,to[maxn],head[maxn],w[maxn],u,v,top;
int a[maxn],b[maxn],c[maxn],co[maxn],r[maxn],q,i;
void dfs(int x,int rg,int col)
{
	if (rg<=r[x]||rg<=0) return;
	r[x]=rg; 
	if (co[x]==0) co[x]=col;
	For(x) dfs(o,rg-1,col);
}
int main()
{
	scanf("%d%d",&n,&m);
	while (m--)
	{
		scanf("%d%d",&u,&v);
		add(u,v); add(v,u);
    }
    scanf("%d",&q);
    for (i=1;i<=q;i++) scanf("%d%d%d",&a[i],&b[i],&c[i]);
    memset(co,0,sizeof(co)); memset(r,0,sizeof(r));
    for (i=q;i>=1;i--) dfs(a[i],b[i]+1,c[i]);
    for (i=1;i<=n;i++) printf("%d\n",co[i]);
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:19:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^
./Main.cpp:22:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&u,&v);
                      ^
./Main.cpp:25:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&q);
                   ^
./Main.cpp:26:57: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     for (i=1;i<=q;i++) scanf("%d%d%d",&a[i],&b[i],&c[i]);
                                                         ^

Judge Result