Eroare de compilare: user.cpp: In function ‘int sol1()’: user.cpp:23:12: error: ‘N’ was not declared in this scope for( i=N;i>=1;i--) ^ user.cpp:25:9: error: ‘DP’ was not declared in this scope DP[i]=0; ^ user.cpp:27:16: error: ‘a’ was not declared in this scope if(a[i]<a[j]&&DP[i]<DP[j]) ^ user.cpp:33:16: error: ‘N’ was not declared in this scope for(i=1;i<=N;i++) ^ user.cpp:34:12: error: ‘DP’ was not declared in this scope if(DP[i]>M) ^ user.cpp:34:18: error: ‘M’ was not declared in this scope if(DP[i]>M) ^ user.cpp:36:12: error: ‘M’ was not declared in this scope return M; ^ user.cpp: In function ‘int main()’: user.cpp:47:9: warning: unused variable ‘x’ [-Wunused-variable] int x; ^ user.cpp: In function ‘int sol1()’: user.cpp:37:1: warning: control reaches end of non-void function [-Wreturn-type] } ^