Compilare: main.cpp: In function 'int main()': main.cpp:51:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i + 1 < comps.size(); i++) ~~~~~~^~~~~~~~~~~~~~ main.cpp:57:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i + 1 < comps.size(); i++) { ~~~~~~^~~~~~~~~~~~~~ main.cpp:24:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("conexidad.in", "r", stdin); ^ main.cpp:25:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("conexidad.out", "w", stdout); ^