Compilare: main.cpp: In function 'int main()': main.cpp:88:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < intervals.size(); i++) { ~~^~~~~~~~~~~~~~~~~~ main.cpp:52:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cerc3.in", "r", stdin); ^ main.cpp:53:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cerc3.out", "w", stdout); ^ main.cpp:56:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:61:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &r); ^