Compilare: main.cpp: In function 'std::vector<Element> mergeV(std::vector<Element>, std::vector<Element>)': main.cpp:45:13: warning: variable 'fa' set but not used [-Wunused-but-set-variable] Element fa = a[i], fb = b[j]; ^~ main.cpp:45:24: warning: variable 'fb' set but not used [-Wunused-but-set-variable] Element fa = a[i], fb = b[j]; ^~ main.cpp: In function 'int main()': main.cpp:149:47: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=] printf("%d\n", 1LL * aux * answer[i] % MOD); ^ main.cpp:122:43: 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:123:45: 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:125:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ main.cpp:127:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^ main.cpp:132:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^