Compilare: user.cpp: In function ‘void read()’: user.cpp:13:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^ user.cpp:15:37: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(A[i] + 1, NMAX, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:131:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pscpld2d.in", "r", stdin); ^ user.cpp:132:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pscpld2d.out", "w", stdout); ^ user.cpp: In function ‘void prepare()’: user.cpp:50:42: warning: ‘who’ may be used uninitialized in this function [-Wmaybe-uninitialized] C[i][j] = min(C[who - (i - who)][j], right - i); ^ user.cpp:36:45: warning: ‘who’ may be used uninitialized in this function [-Wmaybe-uninitialized] L[i][j] = min(L[i][who - (j - who)], right - j); ^