#include<stdio.h>
int main()
{
        int M[20],ID[20],N,temp,temp1,i,j;
    scanf("%d",&N);
    if(N>150000||ID[20]>10^7||M[20]>100)
            printf("Invalid input\n");
    else
    {
    printf("Enter the No.of.teams:\n",N);
    for(i=0;i<N;i++)
    {
            scanf("%d %d",&ID[i],&M[i]);
    }
    for(i=0;i<N;i++)
    {
        printf("ID:%d    M:%d\n",ID[i],M[i]);
    }
    for(i=0;i<N;i++)
        for(j=0;j<N-1;j++)
        {
        if(M[j]<M[j+1])
        {
            temp=M[j];
            M[j]=M[j+1];
            M[j+1]=temp;
            temp1=ID[j];
            ID[j]=ID[j+1];
            ID[j+1]=temp1;
        }
        }
    printf("Bubble sort desending order\n");
    for(i=0;i<N;i++)
    {
        printf("ID: %d M:%d \n",ID[i],M[i]);
    }
    }
}


Whats wrong with this code. Any one know means pls tell the error.