Main.cpp: In function 'int32_t main()':
Main.cpp:10:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
10 | freopen("duck.inp", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:11:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
11 | freopen("duck.out", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:28:13: warning: 'three' may be used uninitialized in this function [-Wmaybe-uninitialized]
28 | three += 1;
| ~~~~~~^~~~
Main.cpp:23:11: warning: 'two' may be used uninitialized in this function [-Wmaybe-uninitialized]
23 | two += 1;
| ~~~~^~~~