Compilare: main.cpp: In function 'void solveTest()': main.cpp:32:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < intervals.size (); i++) { ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:79:40: 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:80:42: 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); ^