Compilare: main.cpp: In function 'int main()': main.cpp:21:32: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'unsigned char*' [-Wformat=] scanf("%d",&a[i][j]); ^ main.cpp:24:32: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'unsigned char*' [-Wformat=] scanf("%d",&o[i][j]); ^ main.cpp:30:19: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if ((l[i]+c[j])%2==1) ^ main.cpp:15:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen(FIN,"r",stdin); ^ main.cpp:16:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen(FOUT,"w",stdout); ^ main.cpp:18:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&N); ^ main.cpp:21:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i][j]); ^ main.cpp:24:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&o[i][j]); ^