Compilare: main.cpp: In function 'pdc mrg(pdc, pdc)': main.cpp:35:19: warning: variable 'a1' set but not used [-Wunused-but-set-variable] pair<int, int>a1 = a[i], b1 = b[i]; ^~ main.cpp:35:30: warning: variable 'b1' set but not used [-Wunused-but-set-variable] pair<int, int>a1 = a[i], b1 = b[i]; ^~ main.cpp: In function 'int main()': main.cpp:197:47: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=] printf("%d\n", 1LL * answer[i] * inv % MOD); ^ main.cpp:171:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("palatulvoltaic.in", "r", stdin); ^ main.cpp:172:45: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("palatulvoltaic.out", "w", stdout); ^ main.cpp: In member function 'char InParser::read_ch()': main.cpp:122:31: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 131072, fin); ^