Compilare: user.cpp: In function ‘std::vector<Range> crossCover(const std::vector<Range>&, const std::vector<Range>&)’: user.cpp:26:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < fiCover.size(); i++) { ^ user.cpp:27:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < seCover.size(); j++) { ^ user.cpp: In function ‘int Solve(int)’: user.cpp:54:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < r.size(); i++) s += r[i].y - r[i].x + 1; ^ user.cpp: In function ‘int main()’: user.cpp:63:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cifrul.in", "r", stdin); ^ user.cpp:64:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cifrul.out", "w", stdout); ^ user.cpp:67:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (scanf("%d", &tCase); tCase != 0; tCase--) { ^ user.cpp:68:45: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &n, &m, &k, &d); ^ user.cpp:71:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &c[i][j]); ^