Compilare: user.cpp: In function ‘int main()’: user.cpp:43:13: warning: statement has no effect [-Wunused-value] d[1][t[x]] != d[1][x]; ^ user.cpp:14:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("color2.in","r",stdin); ^ user.cpp:15:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("color2.out","w",stdout); ^ user.cpp:17:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ",&N); ^ user.cpp:20:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d ",&x,&y); ^ user.cpp:54:36: warning: array subscript is above array bounds [-Warray-bounds] d[0][fiu[1][x]] = (d[1][fiu[2][x]] == 1 || (x != 1 && d[0][x] == 0)); ^