Submission #117694

#	Time	Username	Problem	Language	Result	Execution time	Memory
117694		JohnTitor	Bitaro the Brave (JOI19_ho_t1)	C++11	100 / 100	327 ms	20548 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
using namespace std;
#define FOR(i, j, k) for(int i=(j); i<=(k); i++)
#define FFOR(i, j, k) for(int i=(j); i<(k); i++)
#define DFOR(i, j, k) for(int i=(j); i>=(k); i--)
#define bug(x) cerr<<#x<<" = "<<(x)<<'\n'
#define pb push_back
#define mp make_pair
#define bit(s, i) (((s)>>(i))&1LL)
#define mask(i) ((1LL<<(i)))
#define builtin_popcount __builtin_popcountll
#define __builtin_popcount __builtin_popcountll
using ll=long long; using ld=long double;
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count()); const ld pi=acos(0)*2;
template <typename T> inline void read(T &x){char c; bool nega=0; while((!isdigit(c=getchar()))&&(c!='-')); if(c=='-'){nega=1; c=getchar();} x=c-48; while(isdigit(c=getchar())) x=x*10+c-48; if(nega) x=-x;}
template <typename T> inline void writep(T x){if(x>9) writep(x/10); putchar(x%10+48);}
template <typename T> inline void write(T x){if(x<0){ putchar('-'); x=-x;} writep(x);}
template <typename T> inline void writeln(T x){write(x); putchar('\n');}
#define taskname "Bitaro"
int h, w;
string s[3000];
int cnt[3000];
int main(){
    #ifdef Aria
        if(fopen(taskname".in", "r"))
            freopen(taskname".in", "r", stdin);
    #endif // Aria
    cin>>h>>w;
    FFOR(i, 0, h) cin>>s[i];
    ll ans=0;
    DFOR(i, h-1, 0){
        FFOR(j, 0, w) if(s[i][j]=='I') cnt[j]++;
        int x=0;
        DFOR(j, w-1, 0) if(s[i][j]=='J'){
//            bug(cnt[j]);
//            bug(x);
            ans+=cnt[j]*x;
        }
        else x+=s[i][j]=='O';
    }
    writeln(ans);
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50