Submission #246776

#	Time	Username	Problem	Language	Result	Execution time	Memory
246776		Vladikus004	Nizin (COCI16_nizin)	C++14	20 / 100	66 ms	9848 KiB

nizin

#include <bits/stdc++.h>
#define int long long
#define inf 2e9
#define all(v) v.begin(), v.end()
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair <int, int> pii;

const int N = 1000000 + 3;
int n, a[N], sum, nsum;

int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    #ifdef LOCAL
        freopen("input.txt", "r", stdin);
    #endif // LOCAL
    cin >> n;
    int mn = inf;
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    for (int i = 0; i < n; i++)
        sum += a[i];
    int ind = -1, ind1 = -1;
    for (int i = 0; i < n; i++){
        nsum += a[i];
        if (nsum * 2 == sum){
            ind = i;
            break;
        }
        if (i + 1 < n && nsum * 2 == sum - a[i + 1]){
            ind1 = i;
            break;
        }
    }
    if (ind == -1 && ind1 == -1){
        cout << n - 1;
        return 0;
    }
    vector <int> v[2];
    for (int i = 0; i < n; i++){
        if (i <= ind || i <= ind1) v[0].push_back(a[i]);
        else v[1].push_back(a[i]);
    }
    reverse(all(v[1]));
    if (ind1 != -1) v[1].pop_back();
//    for (auto u: v[0]) cout << u << " "; cout << "!\n";
//    for (auto u: v[1]) cout << u << " "; cout << "!\n";
    int i1 = 0, i2 = 0, ans = 0;
    while (i1 < v[0].size()){
        int j1 = i1 + 1;
        int j2 = i2 + 1;
        int sum1 = v[0][i1];
        int sum2 = v[1][i2];
        while (sum1 !=  sum2){
            while (sum1 < sum2) sum1 += v[0][j1++], ans++;
            while (sum2 < sum1) sum2 += v[1][j2++], ans++;
        }
        i1 = j1;
        i2 = j2;
    }
    cout << ans;
}

Compilation message (stderr)

nizin.cpp: In function 'int32_t main()':
nizin.cpp:53:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while (i1 < v[0].size()){
            ~~~^~~~~~~~~~~~~
nizin.cpp:21:9: warning: unused variable 'mn' [-Wunused-variable]
     int mn = inf;
         ^~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10