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.. well, i don't know the reason of WA for this code, can somebody helps?

#include<iostream>
#include<vector>

using namespace std;

typedef struct
{
int i, j;
}item;

int main()
{
int n, m, o, x = 1, z, val;
int x1, y1, x2, y2;
string s;
do
{
cin >> n >> m;
if(n!=0&&m!=0)
{
if(x>1)cout ...

can somebody helps? i don't know why i'm getting WA, this is the code

#include<iostream>
#include<vector>
#include<algorithm>
#include<map>
#include<iomanip>
#include<utility>
#include<set>

using namespace std;

typedef struct
{
char mode;
set<string> trids;
}thing;

typedef unsigned long long ...