Compilare: main.cpp: In function 'void write()': main.cpp:90:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("smen.out", "w", stdout); ^ main.cpp: In function 'void read()': main.cpp:111:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("smen.in", "r", stdin); ^ main.cpp:112:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &N, &K, &A, &B); ^ main.cpp:114:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &V[i]); ^