Compilare: main.cpp: In function 'void read()': main.cpp:23:50: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] if(bin[i][j]) query[j + 1] += 1 << i - 1; ~~^~~ main.cpp: In function 'int main()': main.cpp:32:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sobo.in", "r", stdin); ^ main.cpp:33:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sobo.out", "w", stdout); ^ main.cpp: In function 'void read()': main.cpp:16:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &L); ^ main.cpp:19:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s ", s); ^ main.cpp:27:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &cost[i]); ^