Submission #580847

#	Time	Username	Problem	Language	Result	Execution time	Memory
580847		Metal_Sonic	Bitaro the Brave (JOI19_ho_t1)	C++17	0 / 100	1 ms	340 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define sz(x) (int)(x).size()
#define all(x) x.begin() , x.end()
void setIO(string name = "") {
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    if(sz(name)){
        freopen((name+".in").c_str(), "r", stdin);
        freopen((name+".out").c_str(), "w", stdout);
    }
}
const int N = 3005;
int I[N] , O[N];
vector<vector<int>>J(N);
void run_test_case(){
    int n , m;cin>>n>>m;
    for(int i = 0; i < n; i++){
        string s;cin>>s;
        bool found = false;
        for(int j = m-1; j >= 0; j--){
            if(s[j] == 'I')I[j]++;
            else if(s[j] == 'O')O[i]++,found=true;
            else if(found) J[i].push_back(j);
        }
    }
    int ans = 0;
    for(int i = 0; i < n; i++){
        for(auto it : J[i]){
            ans+=O[i]*I[it];
        }
    }
    cout<<ans;
}
int main() {
    setIO();
    int T = 1;
    while(T--){
        run_test_case();
    }
    return 0;
}

Compilation message (stderr)

joi2019_ho_t1.cpp: In function 'void setIO(std::string)':
joi2019_ho_t1.cpp:9:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |         freopen((name+".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t1.cpp:10:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |         freopen((name+".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 50