Compilare: main.cpp: In function 'void read(int)': main.cpp:32:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i].val); ^ main.cpp:39:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[t][i]); ^ main.cpp: In function 'int main()': main.cpp:125:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^ main.cpp:129:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &a, &b); ^ In file included from /usr/include/string.h:635:0, from /usr/include/c++/6/cstring:42, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:48, from main.cpp:1: In function 'void* memset(void*, int, size_t)', inlined from 'void read(int)' at main.cpp:29:30: /usr/include/x86_64-linux-gnu/bits/string3.h:90:70: warning: call to void* __builtin___memset_chk(void*, int, long unsigned int, long unsigned int) will always overflow destination buffer return __builtin___memset_chk (__dest, __ch, __len, __bos0 (__dest)); ^