Compilare: user.cpp: In function ‘char solve()’: user.cpp:34:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(odd < par[1].size() || even < par[0].size()) { ^ user.cpp:34:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(odd < par[1].size() || even < par[0].size()) { ^ user.cpp:38:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(even < par[0].size()) { ^ user.cpp:51:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(odd < par[1].size()) { ^ user.cpp:64:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(odd < par[1].size() && vis[par[1][odd]]) ^ user.cpp:66:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(even < par[0].size() && vis[par[0][even]]) ^ user.cpp: In function ‘int main()’: user.cpp:75:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cutie.in", "r", stdin); ^ user.cpp:76:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cutie.out", "w", stdout); ^ user.cpp:79:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:83:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &k, &m); ^ user.cpp:87:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &stricat[i]); ^ user.cpp:92:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &cutie[i]); ^