제출 #57074

#제출 시각아이디문제언어결과실행 시간메모리
57074alenam0161Paint By Numbers (IOI16_paint)C++17
100 / 100
604 ms129840 KiB
#include "paint.h" #include <cstdlib> #include <bits/stdc++.h> using namespace std; const int N = 300007; const int K = 307; bool suf[N][K]; bool pre[N][K]; int gum[N]; int vl[N]; int g[N]; std::string solve_puzzle(std::string s, std::vector<int> c) { int n=s.length(); int k=c.size(); for(int i=0;i<n;++i){ if(i)gum[i]+=gum[i-1]; gum[i]+=(s[i]=='_'); } auto sum=[&](int l,int r){ return gum[r]-(l==0 ? 0:gum[l-1]); }; suf[n][k]=true; suf[n+1][k]=true; for(int i=n-1;i>=0;i--){ for(int j=k;j>=0;--j){ if(s[i]!='X'&&suf[i+1][j])suf[i][j]=true; if(j==k)continue; if(c[j]+i-1<n&&sum(i,i+c[j]-1)==0){ if(i+c[j]<n&&s[i+c[j]]=='X')continue; if(suf[i+c[j]+1][j+1]==false)continue; suf[i][j]=true; } } } for(int i=0;i<n;++i){ for(int j=-1;j<k;++j){ int z=(i==0&&j==-1); if(s[i]!='X'&&z)pre[0][0]=true; if(s[i]!='X'&&z==false&&pre[i-1][j+1]==true)pre[i][j+1]=true; if(j==-1)continue; if(i-c[j]+1>=0&&sum(i-c[j]+1,i)==0){ if(i-c[j]>=0&&s[i-c[j]]=='X')continue; if(i-c[j]-1<0&&j!=0)continue; if(i-c[j]-1>=0&&pre[i-c[j]-1][j]==false)continue; pre[i][j+1]=true; } } } for(int i=0;i<n;++i){ for(int j=-1;j<k;++j){ if(s[i]!='.')continue; bool okl=false; bool okr=false; if(suf[i+1][j+1]==true)okr=true; okl=(i==0&&j==-1)||(!(i==0&&j==-1)&&pre[i-1][j+1]); if(okr&&okl)vl[i]|=1; } } for(int i=0;i<n;++i){ for(int j=0;j<k;++j){ if(s[i]=='_')continue; bool ok=false; if(c[j]+i-1<n){ bool x=true; if(i>0){ if(s[i-1]=='X')x=false; else if(i-2>=0){ if(pre[i-2][j]==false){ x=false; } } else if(j!=0)x=false; } else if(j!=0)x=false; if(x==false)continue; if(c[j]+i==n){ if(pre[c[j]+i-1][j+1]==true&&j==k-1&&sum(i,c[j]+i-1)==0) g[i]=max(g[i],c[j]); } else if(pre[c[j]+i-1][j+1]==true&&suf[c[j]+i+1][j+1]==true&&s[c[j]+i]!='X'&&sum(i,c[j]+i-1)==0){ g[i]=max(g[i],c[j]); } } } } for(int i=0;i<n;++i){ if(g[i]>0)vl[i]|=2; g[i+1]=max(g[i+1],g[i]-1); } for(int i=0;i<n;++i){ if(s[i]=='.'){ if(vl[i]==0)assert(0); if(vl[i]==1)s[i]='_'; if(vl[i]==2)s[i]='X'; if(vl[i]==3)s[i]='?'; } } return s; }

컴파일 시 표준 에러 (stderr) 메시지

paint.cpp: In function 'std::__cxx11::string solve_puzzle(std::__cxx11::string, std::vector<int>)':
paint.cpp:62:22: warning: unused variable 'ok' [-Wunused-variable]
                 bool ok=false;
                      ^~
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