int maximalSquare(char** matrix, int matrixSize, int* matrixColSize){
    int dp[301][301]={0};
    int wid=0;
    if(matrixSize==0&&matrixColSize[0]==0){
        return 0;
    }
    for(int i=0;i<matrixSize;i++){
        for(int j=0;j<matrixColSize[0];j++){
            if(matrix[i][j]=='1'){
                if(i==0||j==0){
                    dp[i][j]=1;
                }
                else{
                    dp[i][j]=fmin(dp[i-1][j],fmin(dp[i][j-1],dp[i-1][j-1]))+1;
                }
            }
            wid=fmax(wid,dp[i][j]);
        }
    }
    return wid*wid;

}