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struct Edge{
    ll idx, dist, fee;
    Edge(int _idx = 0, ll _dist = 0, ll _fee = 0){
        idx = _idx; dist = _dist; fee = _fee;
    }
};
 
int n, g;
vector<Edge> adj[N];
 
int res;
ll numGold[N], numFuel[N];
 
void dfsGold(int u, int p, int g){
    numGold[u] = g;
    for(auto x : adj[u]) if(x.idx != p){
        int v = x.idx; ll fee = x.fee;
        dfsGold(v, u, g + fee);
    }
}
 
void dfsFuel(int u, int p, ll g, ll d){
    numFuel[u] = d;
    for(auto x : adj[u]) if(x.idx != p){
        int v = x.idx; ll fee = x.fee; ll w = x.dist;
        dfsFuel(v, u, g - fee, d + (g - fee)*w);
    }
}
 
void solve(){
    int q; cin >> q;
    while(q--){
        int t; cin >> t;
        if(t == 0){
            int x, y, w; cin >> x >> y >> w;
            for(auto &v : adj[x])
                if(v.idx == y) v.fee = w;
            for(auto &v : adj[y])
                if(v.idx == x) v.fee = w;
        }
        else{
            int x, y; cin >> x >> y;
            dfsGold(x, -1, 0);
            ll gold = numGold[y] + g;
            dfsFuel(x, -1, gold, 0);
            cout << numFuel[y]  << '\n';
        }
    }
}

prog.cpp:2:5: error: ‘ll’ does not name a type
     ll idx, dist, fee;
     ^~
prog.cpp:3:24: error: ‘ll’ has not been declared
     Edge(int _idx = 0, ll _dist = 0, ll _fee = 0){
                        ^~
prog.cpp:3:38: error: ‘ll’ has not been declared
     Edge(int _idx = 0, ll _dist = 0, ll _fee = 0){
                                      ^~
prog.cpp: In constructor ‘Edge::Edge(int, int, int)’:
prog.cpp:4:9: error: ‘idx’ was not declared in this scope
         idx = _idx; dist = _dist; fee = _fee;
         ^~~
prog.cpp:4:9: note: suggested alternative: ‘_idx’
         idx = _idx; dist = _dist; fee = _fee;
         ^~~
         _idx
prog.cpp:4:21: error: ‘dist’ was not declared in this scope
         idx = _idx; dist = _dist; fee = _fee;
                     ^~~~
prog.cpp:4:21: note: suggested alternative: ‘_dist’
         idx = _idx; dist = _dist; fee = _fee;
                     ^~~~
                     _dist
prog.cpp:4:35: error: ‘fee’ was not declared in this scope
         idx = _idx; dist = _dist; fee = _fee;
                                   ^~~
prog.cpp:4:35: note: suggested alternative: ‘_fee’
         idx = _idx; dist = _dist; fee = _fee;
                                   ^~~
                                   _fee
prog.cpp: At global scope:
prog.cpp:9:1: error: ‘vector’ does not name a type
 vector<Edge> adj[N];
 ^~~~~~
prog.cpp:12:1: error: ‘ll’ does not name a type
 ll numGold[N], numFuel[N];
 ^~
prog.cpp: In function ‘void dfsGold(int, int, int)’:
prog.cpp:15:5: error: ‘numGold’ was not declared in this scope
     numGold[u] = g;
     ^~~~~~~
prog.cpp:15:5: note: suggested alternative: ‘dfsGold’
     numGold[u] = g;
     ^~~~~~~
     dfsGold
prog.cpp:16:18: error: ‘adj’ was not declared in this scope
     for(auto x : adj[u]) if(x.idx != p){
                  ^~~
prog.cpp:17:24: error: ‘ll’ was not declared in this scope
         int v = x.idx; ll fee = x.fee;
                        ^~
prog.cpp:18:27: error: ‘fee’ was not declared in this scope
         dfsGold(v, u, g + fee);
                           ^~~
prog.cpp: At global scope:
prog.cpp:22:28: error: ‘ll’ has not been declared
 void dfsFuel(int u, int p, ll g, ll d){
                            ^~
prog.cpp:22:34: error: ‘ll’ has not been declared
 void dfsFuel(int u, int p, ll g, ll d){
                                  ^~
prog.cpp: In function ‘void dfsFuel(int, int, int, int)’:
prog.cpp:23:5: error: ‘numFuel’ was not declared in this scope
     numFuel[u] = d;
     ^~~~~~~
prog.cpp:23:5: note: suggested alternative: ‘dfsFuel’
     numFuel[u] = d;
     ^~~~~~~
     dfsFuel
prog.cpp:24:18: error: ‘adj’ was not declared in this scope
     for(auto x : adj[u]) if(x.idx != p){
                  ^~~
prog.cpp:25:24: error: ‘ll’ was not declared in this scope
         int v = x.idx; ll fee = x.fee; ll w = x.dist;
                        ^~
prog.cpp:25:42: error: expected ‘;’ before ‘w’
         int v = x.idx; ll fee = x.fee; ll w = x.dist;
                                          ^~
                                          ;
prog.cpp:26:27: error: ‘fee’ was not declared in this scope
         dfsFuel(v, u, g - fee, d + (g - fee)*w);
                           ^~~
prog.cpp:26:46: error: ‘w’ was not declared in this scope
         dfsFuel(v, u, g - fee, d + (g - fee)*w);
                                              ^
prog.cpp: In function ‘void solve()’:
prog.cpp:31:12: error: ‘cin’ was not declared in this scope
     int q; cin >> q;
            ^~~
prog.cpp:36:27: error: ‘adj’ was not declared in this scope
             for(auto &v : adj[x])
                           ^~~
prog.cpp:38:27: error: ‘adj’ was not declared in this scope
             for(auto &v : adj[y])
                           ^~~
prog.cpp:44:13: error: ‘ll’ was not declared in this scope
             ll gold = numGold[y] + g;
             ^~
prog.cpp:45:28: error: ‘gold’ was not declared in this scope
             dfsFuel(x, -1, gold, 0);
                            ^~~~
prog.cpp:45:28: note: suggested alternative: ‘void’
             dfsFuel(x, -1, gold, 0);
                            ^~~~
                            void
prog.cpp:46:13: error: ‘cout’ was not declared in this scope
             cout << numFuel[y]  << '\n';
             ^~~~
prog.cpp:46:21: error: ‘numFuel’ was not declared in this scope
             cout << numFuel[y]  << '\n';
                     ^~~~~~~
prog.cpp:46:21: note: suggested alternative: ‘dfsFuel’
             cout << numFuel[y]  << '\n';
                     ^~~~~~~
                     dfsFuel

Standard output is empty