Compilare: main.cpp: In function 'int main()': main.cpp:25:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(it <= v[1].size()) pos[x][1].push_back(it); ~~~^~~~~~~~~~~~~~ main.cpp:26:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(it <= v[1].size() + v[2].size()) pos[x][2].push_back(it); ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:63:30: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<std::pair<int, int> >::size_type {aka long unsigned int}' [-Wformat=] printf("%d\n", Sol.size()); ^ main.cpp:13:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("egipt.in", "r", stdin); ^ main.cpp:14:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("egipt.out", "w", stdout); ^ main.cpp:16:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:19:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^