Compilare: user.cpp: In function ‘int main()’: user.cpp:66:18: warning: suggest parentheses around comparison in operand of ‘==’ [-Wparentheses] if(p1!=0||(l1==c1==1)) ^ user.cpp:111:18: warning: suggest parentheses around comparison in operand of ‘==’ [-Wparentheses] if(p2!=0||(c2==l2==1)) ^ user.cpp:158:18: warning: suggest parentheses around comparison in operand of ‘==’ [-Wparentheses] if(p3!=0||(l1==c1==1)) ^ user.cpp:202:18: warning: suggest parentheses around comparison in operand of ‘==’ [-Wparentheses] if(p4!=0||(l2==c2==1)) ^ user.cpp:5:32: 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:6:34: 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:7:55: 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,&k1,&k2,&l1,&c1,&l2,&c2); ^ user.cpp:12:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i][j]); ^