Submission #391629

#TimeUsernameProblemLanguageResultExecution timeMemory
391629keta_tsimakuridzeGrowing Vegetable is Fun 3 (JOI19_ho_t3)C++14
100 / 100
92 ms6664 KiB
#include<bits/stdc++.h> #define f first #define int long long #define s second using namespace std; const int N=405,mod=1e16; int t,dp[2][N][N][4],cnt[4],kth[4][N],aft[4][4][N][N],n; string s; main(){ // t=1; cin >> n; cin>>s; s='#'+s; for(int i=1;i<=n;i++){ if(s[i]=='R') s[i]='0'; else if(s[i]=='Y') s[i]='1'; else s[i]='2'; cnt[s[i]-'0']++; kth[s[i]-'0'][cnt[s[i]-'0']] = i; } for(int i=0;i<=2;i++){ for(int j=0;j<=2;j++){ if(i==j) continue; for(int k=0;k<=cnt[i];k++){ for(int k1=1;k1<=cnt[j];k1++){ aft[i][j][k][k1] = aft[i][j][k][k1-1] + (kth[j][k1] > kth[i][k]); } } } } for(int i=0;i<=n;i++){ for(int j=0;j<=cnt[0];j++){ for(int k=0;k<=cnt[1];k++){ dp[0][j][k][0]=dp[0][j][k][1]=dp[0][j][k][2]=mod; }} } dp[0][0][0][0]=dp[0][0][0][1]=dp[0][0][0][2]=0; for(int i=1;i<=n;i++){ for(int j=0;j<=cnt[0];j++){ for(int k=0;k<=cnt[1];k++){ if(i-k-j>cnt[2]) continue; dp[1][j][k][0]=dp[1][j][k][1]=dp[1][j][k][2]=mod; if(j) dp[1][j][k][0] =min(mod, min(dp[0][j-1][k][1],dp[0][j-1][k][2]) + kth[0][j] + aft[0][1][j][k] + aft[0][2][j][i-k-j] - i); if(k) dp[1][j][k][1] =min(mod, min(dp[0][j][k-1][2],dp[0][j][k-1][0]) + kth[1][k] + aft[1][0][k][j] + aft[1][2][k][i-k-j] - i); if(i-j-k) dp[1][j][k][2] = min(mod,min(dp[0][j][k][1],dp[0][j][k][0]) + kth[2][i-j-k] + aft[2][0][i-j-k][j] + aft[2][1][i-j-k][k] - i); } } for(int j=0;j<=cnt[0];j++){ for(int k=0;k<=cnt[1];k++){ dp[0][j][k][0]=dp[1][j][k][0]; dp[0][j][k][2]=dp[1][j][k][2]; dp[0][j][k][1]=dp[1][j][k][1]; }} } int c = min(dp[0][cnt[0]][cnt[1]][0],min(dp[0][cnt[0]][cnt[1]][1],dp[0][cnt[0]][cnt[1]][2])); if(c==mod)cout<<-1; else cout<<c; }

Compilation message (stderr)

joi2019_ho_t3.cpp:9:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    9 |  main(){
      |       ^
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...