Compilare: main.cpp: In function 'void solve_test()': main.cpp:77:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pos < now.size() && now[pos].first.first < st) ~~~~^~~~~~~~~~~~ main.cpp:82:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pos < now.size() && st <= now[pos].first.first && now[pos].first.first <= dr) ~~~~^~~~~~~~~~~~ main.cpp:109:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pos < now.size()) { prv.push_back(now[pos]); pos++; } ~~~~^~~~~~~~~~~~ main.cpp:34:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ main.cpp: In function 'int main()': main.cpp:117:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("aliniate.in", "r", stdin); ^ main.cpp:119:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("aliniate.out", "w", stdout); ^ main.cpp:123:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^