Compilare: user.cpp: In function ‘int main()’: user.cpp:20:5: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for ( int i = 1; i <= n; ++i) ^~~ user.cpp:23:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ short x,y; ^~~~~ user.cpp:17:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("struti.in","r",stdin); ^ user.cpp:18:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("struti.out","w",stdout); ^ user.cpp: In function ‘void Next()’: user.cpp:132:44: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] std::fread(s, 1, Lim, stdin), u = 0; ^