Compilare: main.cpp: In function 'int main()': main.cpp:56:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++i) { ~~^~~~~~~~~~ main.cpp:57:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < o.size(); ++j) { ~~^~~~~~~~~~ main.cpp:62:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++i) { ~~^~~~~~~~~~ main.cpp:63:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 1; j < v.size(); ++j) { ~~^~~~~~~~~~ main.cpp:67:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < o.size(); ++k) { ~~^~~~~~~~~~ main.cpp:39:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("segmente.in", "r", stdin); ^ main.cpp:40:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("segmente.out", "w", stdout); ^