0_0_21977589_30313.cpp: In function 'int main()': 0_0_21977589_30313.cpp:14:19: error: 'n' was not declared in this scope scanf("%d%d",&n,&m); ^ 0_0_21977589_30313.cpp:14:22: error: 'm' was not declared in this scope scanf("%d%d",&n,&m); ^