Submission #874856

#	Time	Username	Problem	Language	Result	Execution time	Memory
874856		josanneo22	Miners (IOI07_miners)	C++17	100 / 100	74 ms	860 KiB

miners

/*
Problem: IOI 2007 Miners 
When:    2023-11-13 21:27:07
Author:  JN
*/
#include<bits/stdc++.h>
using namespace std;
 
using i64 = long long;
using pii = pair<int, int>;
#define L(i,j,k) for(int i=(j);i<=(k);++i)
#define R(i,j,k) for(int i=(j);i>=(k);--i)
#define all(x) x.begin(), x.end()
 
int dp[2][4][4][4][4];

namespace fast{
    #pragma GCC optimize(Ofast)
    #pragma GCC optimization (unroll-loops)
    #pragma GCC target(avx,avx2,fma)
    #pragma GCC target(sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,tune=native)
    #pragma GCC optimize(3)
    #pragma GCC optimize("inline")
    #pragma GCC optimize("-fgcse")
    #pragma GCC optimize("-fgcse-lm")
    #pragma GCC optimize("-fipa-sra")
    #pragma GCC optimize("-ftree-pre")
    #pragma GCC optimize("-ftree-vrp")
    #pragma GCC optimize("-fpeephole2")
    #pragma GCC optimize("-ffast-math")
    #pragma GCC optimize("-fsched-spec")
    #pragma GCC optimize("unroll-loops")
    #pragma GCC optimize("-falign-jumps")
    #pragma GCC optimize("-falign-loops")
    #pragma GCC optimize("-falign-labels")
    #pragma GCC optimize("-fdevirtualize")
    #pragma GCC optimize("-fcaller-saves")
    #pragma GCC optimize("-fcrossjumping")
    #pragma GCC optimize("-fthread-jumps")
    #pragma GCC optimize("-funroll-loops")
    #pragma GCC optimize("-fwhole-program")
    #pragma GCC optimize("-freorder-blocks")
    #pragma GCC optimize("-fschedule-insns")
    #pragma GCC optimize("inline-functions")
    #pragma GCC optimize("-ftree-tail-merge")
    #pragma GCC optimize("-fschedule-insns2")
    #pragma GCC optimize("-fstrict-aliasing")
    #pragma GCC optimize("-fstrict-overflow")
    #pragma GCC optimize("-falign-functions")
    #pragma GCC optimize("-fcse-skip-blocks")
    #pragma GCC optimize("-fcse-follow-jumps")
    #pragma GCC optimize("-fsched-interblock")
    #pragma GCC optimize("-fpartial-inlining")
    #pragma GCC optimize("no-stack-protector")
    #pragma GCC optimize("-freorder-functions")
    #pragma GCC optimize("-findirect-inlining")
    #pragma GCC optimize("-fhoist-adjacent-loads")
    #pragma GCC optimize("-frerun-cse-after-loop")
    #pragma GCC optimize("inline-small-functions")
    #pragma GCC optimize("-finline-small-functions")
    #pragma GCC optimize("-ftree-switch-conversion")
    #pragma GCC optimize("-foptimize-sibling-calls")
    #pragma GCC optimize("-fexpensive-optimizations")
    #pragma GCC optimize("-funsafe-loop-optimizations")
    #pragma GCC optimize("inline-functions-called-once")
    #pragma GCC optimize("-fdelete-null-pointer-checks")
}
using namespace fast;
inline string read_string()//inline继续加快速度
{
    char ch=getchar();
    string st1="";
    while (!((ch>='A')&&(ch<='Z'))) ch=getchar();
    while ((ch>='A')&&(ch<='Z'))  st1+=ch,ch=getchar();
    return st1;
}
template<typename T> inline void re(T &x){ x = 0; T f = 1; char ch = getchar();  while (!isdigit(ch)) {if (ch == '-') f = -1; ch = getchar();} while (isdigit(ch))  {x = (x<<1) + (x<<3) + (ch^48) ; ch = getchar();} x *= f; }
template<typename x,typename... y>void re(x& a,y&... b){re(a);re(b...);} 
template<typename T> inline void ps(T x) { if(x < 0){ putchar('-'); x = -x; } if(x > 9)  ps(x / 10); putchar(x % 10 + '0');}
template<typename x,typename... y>void ps(x& a,y&... b){ps(a); putchar(' '); ps(b...);} 
#define sp putchar(' ')
#define nl putchar('\n')

const int N=1e5+500;
char s[N];
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);
 
    int n; re(n);
    string s=read_string();
    vector<int> a(n+1);
    L(i,0,n-1){
        if(s[i]=='M') a[i]=1;
        if(s[i]=='B') a[i]=2;
        if(s[i]=='F') a[i]=3;
    }
    memset(dp,-1,sizeof(dp));
    dp[0][0][0][0][0]=0;
    auto profit=[&](int x,int y,int z){
        if(!x && !y) return 1;
        if(!x) return (y!=z)+1;
        if(x==y && y==z) return 1;
        return (x!=y)+(y!=z)+(z!=x);
    };
    L(i,0,n-1){
        int nw=i&1;int nx=nw^1;
        L(a1,0,3) L(a2,0,3) L(b1,0,3) L(b2,0,3){
            if(dp[nw][a1][a2][b1][b2]==-1) continue;
            dp[nx][a2][a[i]][b1][b2]=max(dp[nx][a2][a[i]][b1][b2], dp[nw][a1][a2][b1][b2]+profit(a1,a2,a[i]));
            dp[nx][a1][a2][b2][a[i]]=max(dp[nx][a1][a2][b2][a[i]], dp[nw][a1][a2][b1][b2]+profit(b1,b2,a[i]));
            // cout<<a1<<' '<<a2<<' '<<b1<<' '<<b2<<' ';
            // cout<<profit(a1,a2,a[i])<<' ';
            // cout<<profit(b1,b2,a[i])<<'\n';
        }
    }
    int ans=0;
    L(a1,0,3) L(a2,0,3) L(b1,0,3) L(b2,0,3){
        if(ans<dp[n&1][a1][a2][b1][b2]){
            ans=dp[n&1][a1][a2][b1][b2];
            //cout<<a1<<' '<<a2<<' '<<b1<<' '<<b2<<'\n';
        }
    }
    ps(ans);
}

Compilation message (stderr)

miners.cpp:19: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
   19 |     #pragma GCC optimization (unroll-loops)
      | 
miners.cpp:18:26: warning: '#pragma GCC optimize' is not a string or number [-Wpragmas]
   18 |     #pragma GCC optimize(Ofast)
      |                          ^~~~~
miners.cpp:20:24: warning: '#pragma GCC option' is not a string [-Wpragmas]
   20 |     #pragma GCC target(avx,avx2,fma)
      |                        ^~~
miners.cpp:21:24: warning: '#pragma GCC option' is not a string [-Wpragmas]
   21 |     #pragma GCC target(sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,tune=native)
      |                        ^~~
miners.cpp:41:43: warning: bad option '-fwhole-program' to pragma 'optimize' [-Wpragmas]
   41 |     #pragma GCC optimize("-fwhole-program")
      |                                           ^
miners.cpp:48:45: warning: bad option '-fstrict-overflow' to pragma 'optimize' [-Wpragmas]
   48 |     #pragma GCC optimize("-fstrict-overflow")
      |                                             ^
miners.cpp:50:45: warning: bad option '-fcse-skip-blocks' to pragma 'optimize' [-Wpragmas]
   50 |     #pragma GCC optimize("-fcse-skip-blocks")
      |                                             ^
miners.cpp:64:55: warning: bad option '-funsafe-loop-optimizations' to pragma 'optimize' [-Wpragmas]
   64 |     #pragma GCC optimize("-funsafe-loop-optimizations")
      |                                                       ^
miners.cpp:69:27: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   69 | inline string read_string()//inline继续加快速度
      |                           ^
miners.cpp:69:27: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
miners.cpp:69:27: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
miners.cpp:69:27: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
miners.cpp:77:41: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   77 | template<typename T> inline void re(T &x){ x = 0; T f = 1; char ch = getchar();  while (!isdigit(ch)) {if (ch == '-') f = -1; ch = getchar();} while (isdigit(ch))  {x = (x<<1) + (x<<3) + (ch^48) ; ch = getchar();} x *= f; }
      |                                         ^
miners.cpp:77:41: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
miners.cpp:77:41: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
miners.cpp:77:41: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
miners.cpp:78:55: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   78 | template<typename x,typename... y>void re(x& a,y&... b){re(a);re(b...);}
      |                                                       ^
miners.cpp:78:55: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
miners.cpp:78:55: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
miners.cpp:78:55: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
miners.cpp:79:40: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   79 | template<typename T> inline void ps(T x) { if(x < 0){ putchar('-'); x = -x; } if(x > 9)  ps(x / 10); putchar(x % 10 + '0');}
      |                                        ^
miners.cpp:79:40: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
miners.cpp:79:40: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
miners.cpp:79:40: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
miners.cpp:80:55: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   80 | template<typename x,typename... y>void ps(x& a,y&... b){ps(a); putchar(' '); ps(b...);}
      |                                                       ^
miners.cpp:80:55: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
miners.cpp:80:55: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
miners.cpp:80:55: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
miners.cpp:86:10: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   86 | int main() {
      |          ^
miners.cpp:86:10: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
miners.cpp:86:10: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
miners.cpp:86:10: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
miners.cpp: In function 'int main()':
miners.cpp:100:38: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
  100 |     auto profit=[&](int x,int y,int z){
      |                                      ^
miners.cpp:100:38: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
miners.cpp:100:38: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
miners.cpp:100:38: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]

• Subtask 1: 9 / 9
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 7 / 7
• Subtask 7: 8 / 8
• Subtask 8: 8 / 8
• Subtask 9: 8 / 8
• Subtask 10: 8 / 8
• Subtask 11: 8 / 8
• Subtask 12: 8 / 8