Compilare: user.cpp: In function ‘int solve(int, int, int, int, int, int)’: user.cpp:26:29: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (xx<=0||yy<=0&&xx>n||yy>n) ^ user.cpp: In function ‘int main()’: user.cpp:43:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("vis.in","r",stdin); ^ user.cpp:44:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("vis.out","w",stdout); ^ user.cpp:45:63: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d %d %d %d\n",&n,&k1,&k2,&x1,&Y1,&x2,&y2); ^ user.cpp:48:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i][j]); ^