Solve a C++ task

I want to know why these c++ code is not returning the required output? #include <iostream> using namespace std; char matrix[100][100]; int main() { int n,i,j; cin>>n; for(i=0;i<n;i++){ for(j=0;j<n;j++) { cin>>matrix[i][j]; } } int cycle = 1; for(i = 0; i<n && cycle == 1;i++) { for(j = 0; j<n && cycle == 1; j++) { if(i == j) { if(matrix[i][j] == '1') { cycle = 0; break; } } if(matrix[i][j] == '1' && matrix[j][i] != '1') { cycle = 0; break; } } } cout<<cycle; return 0; /* 011 // 101 110 0110000 1010000 1100000 0000101 0001010 0000101 0001010 0100001 1010000 0101000 0010100 0001010 0000101 1000010 */ } This was the question. I finish coding but it simply does not return the desired output: Cycles Is a graph denoted by the adjacency matrix a cycle graph? Input In the first line: a number of next lines. In a line (expect the first): a number of vertices and after space an adjacency matrix written from the left to the right and from the top to the bottom. Output 1 if a graph is a cycle, 0 else. Example Input 5 3 011101110 7 0110000101000011000000000101000101000001010001010 7 0100001101000001010000010100000101000001011000010 5 0101010000000011000000100 5 0100110010000110110010100 Output 1 0 1 0 1