Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:46:31: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] d[x][j] = d[y][j+1]; ~~~~~~~~^ user.cpp:46:31: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] d[x][j] = d[y][j+1]; ~~~~~~~~^ user.cpp:46:31: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] d[x][j] = d[y][j+1]; ~~~~~~~~^ user.cpp:46:31: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] d[x][j] = d[y][j+1]; ~~~~~~~~^ user.cpp:46:31: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] d[x][j] = d[y][j+1]; ~~~~~~~~^ user.cpp:46:31: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] d[x][j] = d[y][j+1]; ~~~~~~~~^ user.cpp:46:31: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] d[x][j] = d[y][j+1]; ~~~~~~~~^ user.cpp:46:31: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] d[x][j] = d[y][j+1]; ~~~~~~~~^ user.cpp:46:31: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] d[x][j] = d[y][j+1]; ~~~~~~~~^ user.cpp: In function ‘int main()’: user.cpp:72:19: warning: ‘z’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << d[z][1] % M; ~~~~~~^