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Submission #764053

# Submission time Handle Problem Language Result Execution time Memory
764053 2023-06-23T06:20:01 Z vjudge1 Fountain (eJOI20_fountain) C++14
30 / 100
 58 ms 3192 KB 
//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include<bits/stdc++.h>
#define ll long long
#define F first
#define S second
#define pb push_back
#define pf push_front
#define ppb pop_back
#define forik(x) ll i = 1; i <= x; i++

const int mod = 1e9 + 7;

using namespace std;

ll n, q, d[100001], c[100001], idx, z, a, b, e, pr[100001], l, r, m;

ll gcd (ll a, ll b){
	while (a > 0 && b > 0){
		if (a >= b){
			a %= b;
		}
		else{
			b %= a;
		}
	}
	return a + b;
}

ll binpow(ll a, ll b){
	a %= mod;
	if(b == 0){
		return 1;
	}
	if(b % 2 == 1){
		return binpow (a, b - 1) % mod * a;
	}
	if(b % 2 == 0){
		ll t = binpow(a, b / 2) % mod;
		return t * t % mod;
	}
}

signed main (){
	ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
cin >> n >> q;
for (int i = 1; i <= n; i++){
	cin >> d[i] >> c[i];
	pr[i] = pr[i - 1] + c[i];
}
for (int i = 1; i < n; i++){
	if (d[i] < d[i + 1]){
		a++;
	}
}
if (a == n - 1){
	while (q--){
		cin >> idx >> z;
		if (pr[n] - pr[idx - 1] < z){
			cout << 0 << '\n';
		}
		else{
			l = idx;
			r = n;
			while (l <= r){
				m = (l + r) / 2;
				if (pr[m] - pr[idx - 1] < z){
					l = m + 1;
				}
				else{
					r = m - 1;
				}
			}
			cout << l << '\n';
		}
	}
}
else{
	while (q--){
		cin >> idx >> r;
		a = d[idx];
		b = 0;
		for (int i = idx; i <= n; i++){
			if (d[i] >= a){
				r -= c[i];
				a = d[i];
			}
			if (r <= 0){
				b = i;
				break;
			}
		}
		cout << b << '\n';
	}	
}

}

Compilation message

fountain.cpp: In function 'long long int binpow(long long int, long long int)':
fountain.cpp:42:1: warning: control reaches end of non-void function [-Wreturn-type]
   42 | }
      | ^

Subtask #1
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 3192 KB Output is correct
2 Correct 58 ms 3180 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -