Submission #1023952

#TimeUsernameProblemLanguageResultExecution timeMemory
1023952lucriSails (IOI07_sails)C++11
50 / 100
1060 ms1236 KiB
#include <bits/stdc++.h> using namespace std; long long n,hmax; long long ans,h,w; long long v[100010]; stack<pair<int,int>>s,ss; static inline void adauga(long long cost,long long length) { if(!s.empty()&&cost==s.top().first) { length+=s.top().second; s.pop(); } s.push({cost,length}); } int main() { ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0); cin>>n; for(long long i=1;i<=n;++i) { cin>>h>>w; v[i]=h*1000000+w; } sort(v+1,v+n+1); for(long long i=1;i<=n;++i) { h=v[i]/1000000; w=v[i]%1000000; if(h>hmax) { adauga(0,h-hmax); hmax=h; } while(w) { if(w>=s.top().second) { ss.push({s.top().first+1,s.top().second}); ans+=s.top().first*s.top().second; w-=s.top().second; s.pop(); } else { ans+=w*s.top().first; ss.push({s.top().first,s.top().second-w}); ss.push({s.top().first+1,w}); w=0; s.pop(); } } while(!ss.empty()) { adauga(ss.top().first,ss.top().second); ss.pop(); } } cout<<ans; return 0; }
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