Compilare: main.cpp: In function 'void solve2()': main.cpp:89:29: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=] printf("%d ", ans.size()); ^ main.cpp:90:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(auto &it : ans) printf("%d ", it); printf("\n"); ^~~ main.cpp:90:44: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(auto &it : ans) printf("%d ", it); printf("\n"); ^~~~~~ main.cpp: In function 'void rd::refresh()': main.cpp:15:51: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, bsize, stdin), cursor = 0; ^ main.cpp: In function 'int main()': main.cpp:95:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("order3.in", "r", stdin); ^ main.cpp:96:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("order3.out", "w", stdout); ^