제출 #649049

#제출 시각아이디문제언어결과실행 시간메모리
649049ToroTN다리 (APIO19_bridges)C++14
컴파일 에러
0 ms0 KiB
#include<bits/stdc++.h> using namespace std; #pragma GCC optimize("O3") #pragma GCC target ("sse4") #define X first #define Y second #define pb push_back set<pair<int,int> > s; vector<pair<int,int> > g; vector<tuple<int,int,int> > answer; stack<pair<int,int> > stk; int n,m,num=sqrt(100000),t,u[100005],v[100005],w[100005],e[100005]; int op[100005],a[100005],b[100005],mx=-1,group[100005],it1,it2; int p[50005],sz[50005],e2[100005],ans[100005],hsh[100005]; int l,r,pasin,nathan; int f(int a) { while(p[a]!=a)a=p[a]; return a; } stack<int> sack; void un(int b,int c) { sz[f(c)]+=sz[f(b)]; p[f(b)]=f(c); } void rollback(int x) { while (sack.size() > x) { int k = sack.top(); sack.pop(); sz[p[k]] -= sz[k]; p[k] = k; } } void iterate() { for(auto it=s.begin();it!=s.end();it++) { printf("krit=%d %d\n",(*it).X,(*it).Y); } printf("\n"); } int main() { scanf("%d%d",&n,&m); for(int i=1;i<=m;i++) { scanf("%d%d%d",&u[i],&v[i],&w[i]); e[i]=w[i]; s.insert({e[i],i}); } scanf("%d",&t); for(int i=1;i<=t;i++) { scanf("%d%d%d",&op[i],&a[i],&b[i]); group[i]=(i-1)/num+1; mx=max(mx,group[i]); } for(int i=1;i<=mx;i++) { l=(i-1)*num+1; r=min(t,i*num); g.clear(); answer.clear(); if(s.size()!=0) for(auto it=s.begin();it!=s.end();it++) { stk.push({(*it).X,(*it).Y}); } while(!stk.empty()) { g.pb({stk.top().X,stk.top().Y}); stk.pop(); } for(int j=1;j<=m;j++)hsh[j]=0; for(int j=l;j<=r;j++) { if(op[j]==2) { answer.pb({b[j],a[j],j}); }else ++hsh[a[j]]; } sort(answer.rbegin(),answer.rend()); it1=0,it2=0; for(int j=1;j<=n;j++)p[j]=j,sz[j]=1; for(int j=1;j<=m;j++)e2[j]=e[j]; top=1e9; while(it2<(int)answer.size()) { auto [w2,node,idx]=answer[it2]; if(it1<(int)g.size()) { int w=g[it1].X,edge=g[it1].Y; if(w>=w2) { if(f(u[edge])!=f(v[edge])&&hsh[edge]==0) { un(u[edge],v[edge]); } ++it1; continue; } } for(int j=l;j<=r;j++) { if(op[j]==1&&j<idx) { e2[a[j]]=b[j]; } } for(int j=l;j<=r;j++) { if(op[j]==1) { if(e2[a[j]]>=b[idx]) { pasin=f(u[a[j]]); nathan=f(v[a[j]]); if(pasin!=nathan) { if(sz[pasin]>sz[nathan])swap(pasin,nathan); sack.push(pasin); sz[nathan]+=sz[pasin]; p[pasin]=nathan; } } } } ans[idx]=sz[f(node)]; for(int j=l;j<=r;j++) { if(op[j]==1&&j<idx)e2[a[j]]=e[a[j]]; } while(!sack.empty()) { sz[p[sack.top()]]-=sz[sack.top()]; p[sack.top()]=sack.top(); sack.pop(); } ++it2; } // for(int j=l;j<=r;j++) // { // if(op[j]==1) // { // if(s.find({e[a[j]],a[j]})!=s.end()) // { // s.erase(s.find({e[a[j]],a[j]})); // } // e[a[j]]=b[j]; // s.insert({e[a[j]],a[j]}); // } // } } for(int i=1;i<=t;i++) { if(op[i]==2)printf("%d\n",ans[i]); } }

컴파일 시 표준 에러 (stderr) 메시지

bridges.cpp: In function 'void rollback(int)':
bridges.cpp:28:21: warning: comparison of integer expressions of different signedness: 'std::stack<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   28 |  while (sack.size() > x) {
      |         ~~~~~~~~~~~~^~~
bridges.cpp: In function 'int main()':
bridges.cpp:88:9: error: 'top' was not declared in this scope; did you mean 'op'?
   88 |         top=1e9;
      |         ^~~
      |         op
bridges.cpp:91:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   91 |             auto [w2,node,idx]=answer[it2];
      |                  ^
bridges.cpp:46:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |     scanf("%d%d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~
bridges.cpp:49:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |         scanf("%d%d%d",&u[i],&v[i],&w[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
bridges.cpp:53:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   53 |     scanf("%d",&t);
      |     ~~~~~^~~~~~~~~
bridges.cpp:56:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |         scanf("%d%d%d",&op[i],&a[i],&b[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~