race.cpp:45:1: error: expected initializer before 'void'
45 | void dfs_sz(ll v,ll p){
| ^~~~
race.cpp: In function 'int find_cen(int, int, int)':
race.cpp:55:23: error: 'f' was not declared in this scope
55 | if(i.fr==p || f[i.fr]) continue;
| ^
race.cpp: In function 'void calc(int, int)':
race.cpp:65:20: error: 'f' was not declared in this scope
65 | if(i==p || f[i])continue;
| ^
race.cpp:68:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
68 | for(ll j=0;j<dp[i].size();j++){
| ~^~~~~~~~~~~~~
race.cpp:74:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
74 | if(low<dp[v].size() && dp[v][low].fr==k-j.fr)chmin(ans,dp[v][low].sc+j.sc);
| ~~~^~~~~~~~~~~~~
race.cpp:76:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
76 | while(l<dp[i].size() || r<dp[v].size()){
| ~^~~~~~~~~~~~~
race.cpp:76:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
76 | while(l<dp[i].size() || r<dp[v].size()){
| ~^~~~~~~~~~~~~
race.cpp:77:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
77 | if(l<dp[i].size() && r<dp[v].size()){
| ~^~~~~~~~~~~~~
race.cpp:77:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
77 | if(l<dp[i].size() && r<dp[v].size()){
| ~^~~~~~~~~~~~~
race.cpp:89:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
89 | }else if(l<dp[i].size()){
| ~^~~~~~~~~~~~~
race.cpp: In function 'void cen_dec(int, int)':
race.cpp:103:5: error: 'dfs_sz' was not declared in this scope
103 | dfs_sz(v,p);
| ^~~~~~
race.cpp:105:5: error: 'f' was not declared in this scope
105 | f[c]=1;
| ^
race.cpp: In function 'int best_path(int, int, int (*)[2], int*)':
race.cpp:114:10: warning: unused variable 'j' [-Wunused-variable]
114 | ll i,j,a,b;
| ^