제출 #1016725

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1016725		ByeWorld	Lasers (NOI19_lasers)	C++14	10 / 100	44 ms	22316 KiB

lasers

#include <bits/stdc++.h>
#pragma GCC optimize("O3", "unroll-loops")
#define ll long long
#define int long long
#define pb push_back
#define fi first
#define se second
#define lf (id<<1)
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
#define ld long double
using namespace std;
typedef pair<int,int> pii;
typedef pair<pii, int> ipii;
const int MAXN = 5e5+10;
const int MAXA = 2e3+10;
const int INF = 1e18+10;
const int LOG = 19;
const int MOD = 1e9+7;
const int SQRT = 450;
const vector<int> NOL = {};
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const vector<int> dx = {1, -1, 0, 0};
const vector<int> dy = {0, 0, 1, -1};
void chmx(int &a, int b){ a = max(a, b); }

int n, num, k[MAXN], tot[MAXN];
vector <int> vec[MAXN];

signed main(){
    // ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin >> n >> num;
    for(int i=1; i<=num; i++){
        cin >> k[i]; vec[i].pb(-1);
        for(int j=1; j<=k[i]; j++){
            int p; cin >> p; vec[i].pb(p);
            tot[i] += p;
        }
    }
    int ANS = 0; 
    vector <pii> seg;
    for(int i=1; i<=num; i++){
        int L = 1, R = n-tot[i]; // L-R kosong
        // cout << L << ' '<< R << " lr\n";
        for(int j=1; j<=k[i]; j++){
            L += vec[i][j]; 
            if(R+1<=L-1){
                seg.pb({R+1, L-1}); // kena
                // cout << i << ' ' << j << " ij\n";
                // cout << R+1 << ' ' << L-1 << " masuk\n";
            }
            R += vec[i][j];
        }
    }
    sort(seg.begin(), seg.end());

    int lasl = 0, lasr = 0;
    for(int i=0; i<seg.size(); ){
        lasl = seg[i].fi; lasr = seg[i].se;
        while(i<seg.size() && seg[i].fi <= lasr){
            lasr = seg[i++].se;
        }
        ANS += lasr-lasl+1;
    }
    cout << ANS << '\n';
}

컴파일 시 표준 에러 (stderr) 메시지

lasers.cpp: In function 'int main()':
lasers.cpp:58:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |     for(int i=0; i<seg.size(); ){
      |                  ~^~~~~~~~~~~
lasers.cpp:60:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |         while(i<seg.size() && seg[i].fi <= lasr){
      |               ~^~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 14
• Subtask 3: 0 / 20
• Subtask 4: 0 / 21
• Subtask 5: 0 / 22
• Subtask 6: 0 / 13