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Why WA anybody help me. my code
#include <bits/stdc++.h>
using namespace std;

int visit[100000], dist[100000];

void BFS(int start, vector <int> *a);

int main()
{
int n, t = 1;
while(scanf("%d", &n) && n)
{
int j = 0;
vector <int> a[100000];
set <int> s;
map <long, int> m;
for(int i = 0; i ...

Why get WA.
Here is my code

#include <stdio.h>
#include <string.h>

int main()
{
int i, j, k, l, t = 1;
char s[100], s1[200];
while(gets(s))
{
l = strlen(s);
j = 0;
for(i = l - 1; i >= 0;)
{
if(s != '0' || s[i-1] != '0')
{
s1[j++] = s[i--];
}
else
i--;
if(i >= 0)
{
if(s != '0')
s1 ...