Compilare: user.cpp: In function ‘int exist(int, int, int, int (*)[51])’: user.cpp:6:5: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for(int i=1;i<=N;i++) ^~~ user.cpp:14:7: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ return 0; ^~~~~~