Compilare: main.cpp: In function 'void ADUNA(int, int, int, int)': main.cpp:96:9: warning: variable 'k' set but not used [-Wunused-but-set-variable] int k; ^ main.cpp: In function 'void read()': main.cpp:26:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &N, &M, &K, &X); ^ main.cpp:28:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^ main.cpp: In function 'int main()': main.cpp:153:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("zumzi.in", "r", stdin); ^ main.cpp:154:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("zumzi.out", "w", stdout); ^