Compilare: main.cpp: In function 'void dfs2(int, std::__cxx11::string&)': main.cpp:17:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i + 1 < edg[x].size(); ++i) { ~~~~~~^~~~~~~~~~~~~~~ main.cpp: In function 'std::__cxx11::string maxSuff(std::__cxx11::string)': main.cpp:68:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < rotC.size(); i += 2) { ~~^~~~~~~~~~~~~ main.cpp:69:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i + 1 >= rotC.size()) ~~~~~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:95:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("parb.in", "r", stdin); ^ main.cpp:96:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("parb.out", "w", stdout); ^ main.cpp:97:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int n; scanf("%d\n%s", &n, (str + 1)); ^ main.cpp:99:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int x, y; scanf("%d %d", &x, &y); ^