求助，为什么代码输出结果看上去没问题但全都wa

#include<iostream>
using namespace std;
int q[1010],n,m,ans;
int main(){
    cin >> n>>m;
    int t = m,i=0;
    while(t){
        q[i] = t%10;
        t/=10;
        i++;
    }
    int k = 1;
    for(int j = i-1;j>=0;j--){
        if(!q[j]) continue;
        cout<<q[j]<<'*'<<n<<'^'<<j;
        if(j) cout<<"+";
    }
}