Submission #1195304

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define RFOR(i,b,a) for (int i = (b)-1; i >= (a); --i)
#define ITER(it,a) for (__typeof(a.begin()) it = a.begin(); it != a.end(); it++)
#define FILL(a,value) memset(a, value, sizeof(a))

#define SZ(a) (int)a.size()
#define ALL(a) a.begin(), a.end()
#define PB push_back
#define MP make_pair

typedef long long LL;
typedef vector<int> VI;
typedef pair<int, int> PII;

const double PI = acos(-1.0);
const int INF = 1000 * 1000 * 1000 + 7;
const LL LINF = 1LL * INF * INF;

const int MAX = 100100;

vector<PII> g[MAX];
int C[MAX];
pair<int,PII> Q[MAX];

int us[MAX];

int ID = 1;

int done = 0;
int n;

PII q[MAX];
int qt,qh;
void paint(int v,int d,int c)
{
	if(done== n)return;
	ID++;
	qt=qh=0;
	q[qt++]=(MP(v,d));
	us[v]=ID;
	if(C[v] == 0)C[v] = c,++done;
	while(qh!=qt)
	{
		int v = q[qh].first;
		int d = q[qh].second;
//		cerr<<v<<" "<<d<<" "<<c<<" "<<C[v]<<endl;
		++qh;
		if(d==0)continue;

		FOR(i,0,SZ(g[v]))
		{
			int to = g[v][i].first;
			int ds = g[v][i].second;
			if(ds>=d)continue;
			if(us[to]==ID)continue;
			g[v][i].second = d;
			if(C[to]==0)
			{
				C[to]=c;
				++done;
				if(done == n)return;
			}
			us[to]=ID;
			if(d==1)continue;

			q[qt++]=(MP(to,d-1));
		}
	}
}
int main()
{
	//freopen("in.txt", "r", stdin);
	//ios::sync_with_stdio(false); cin.tie(0);

	int m;

	scanf("%d%d",&n,&m);

	FOR(i,0,m)
	{
		int a,b;
		scanf("%d%d",&a,&b);
		--a;--b;
		g[a].PB(MP(b,0));
		g[b].PB(MP(a,0));
	}

	int q;
	scanf("%d",&q);
	FOR(i,0,q)
	{
		scanf("%d%d%d",&Q[i].first,&Q[i].second.first,&Q[i].second.second);
		--Q[i].first;
	}

	RFOR(i,q,0)
	{
		paint(Q[i].first,Q[i].second.first,Q[i].second.second);
	}

	FOR(i,0,n)
	{
		printf("%d\n",C[i]);
	}
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:80:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^
./Main.cpp:85:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&a,&b);
                      ^
./Main.cpp:92:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&q);
                ^
./Main.cpp:95:69: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d",&Q[i].first,&Q[i].second.first,&Q[i].second.second);
                                                                     ^

Judge Result