OJ Board

This code seems to work whatever I feed it with but I still get WA. Can someone help ?


#include <stdio.h>

int edge[5000][2];
int node[101];
int nodes;
int edges, length;

int main()
{
int start, i, j, ncase, cont;

for(scanf("%d",&nodes),ncase=1; nodes>0; scanf("%d",&nodes),ncase++) {
scanf ...