Submission #1369810

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Source Code Expand

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int n;
priority_queue<ll> pq1;
ll bias1, bias2;
priority_queue<ll,vector<ll>,greater<ll> > pq2;
ll res;

void push(ll a, ll b, ll l) {
    if (l==-1) {
        pq1.push(a+bias1); pq2.push(a-bias2);
        return;
    }
    bias1 += b-a; bias2 += l;
    if (a<=pq1.top()-bias1) {
        res += pq1.top()-bias1-a;
        pq2.push(pq1.top()-bias1-bias2);
        pq1.pop();
        pq1.push(a+bias1);
        pq1.push(a+bias1);
    }
    else if (a<=pq2.top()+bias2) {
        pq1.push(a+bias1);
        pq2.push(a-bias2);
    }
    else {
        res += a-pq2.top()-bias2;
        pq1.push(pq2.top()+bias1+bias2);
        pq2.pop();
        pq2.push(a-bias2);
        pq2.push(a-bias2);
    }
}

int main() {
    int i;
    scanf("%d",&n);
    ll l = -1;
    for (i=0;i<n;i++) {
        ll a, b;
        scanf("%lld%lld",&a,&b);
        push(a,b,l);
        l = b-a;
    }
    printf("%lld\n",res);
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:41:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
                   ^
./Main.cpp:45:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld%lld",&a,&b);
                                ^

Judge Result