Compilare: main.cpp: In function 'void rebuild()': main.cpp:66:9: warning: unused variable 'Sum' [-Wunused-variable] int Sum = 0; ^~~ main.cpp: In function 'void add(int, char)': main.cpp:82:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(buckets[i].s.size() > 2 * rad) rebuild(); ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~ main.cpp:98:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(buckets[i].s.size() > 2 * rad) rebuild(); ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:167:38: warning: unused variable 'no' [-Wunused-variable] int last = 0, tip, pos, a, b, i, no = 0; ^~ main.cpp:148:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sir8.out", "w", stdout); ^