Compilare: main.cpp: In function 'void solve()': main.cpp:79:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | for(int i=0;i<t.size();i++) | ~^~~~~~~~~ main.cpp:81:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for(int i=0;i<t.size();i++) | ~^~~~~~~~~ main.cpp:92:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 92 | for(int i=0;i<t.size();i++) | ~^~~~~~~~~ main.cpp:99:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 99 | for(int i=0;i<t.size();i++) | ~^~~~~~~~~ main.cpp:102:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 102 | for(int i=0;i<t.size();i++) | ~^~~~~~~~~ main.cpp:113:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 113 | for(int i=0;i<t.size();i++) | ~^~~~~~~~~ main.cpp: In function 'int toint(char)': main.cpp:19:1: warning: control reaches end of non-void function [-Wreturn-type] 19 | } | ^