Compilare: main.cpp: In function 'int main()': main.cpp:28:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tsunami.in", "r", stdin); ^ main.cpp:29:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tsunami.out", "w", stdout); ^ main.cpp:31:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%hd%hd%hd", &n, &m, &h); ^ main.cpp:34:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%hd", &a[i][j]); ^