Submission #896131

#	Time	Username	Problem	Language	Result	Execution time	Memory
896131		Andrey	Xylophone (JOI18_xylophone)	C++14	100 / 100	58 ms	600 KiB

xylophone

#include "xylophone.h"
#include<bits/stdc++.h>
using namespace std;

void solve(int N) {
    int n = N;
    vector<int> dif(n-1);
    dif[0] = query(1,2);
    for(int i = 1; i < n-1; i++) {
        dif[i] = query(i+1,i+2);
        if((abs(dif[i-1])+dif[i] == query(i,i+2)) == (dif[i-1] < 0)) {
            dif[i]*=-1;
        }
    }
    vector<int> ans(n);
    ans[0] = 0;
    int sm = 0,p1,p2;
    for(int i = 1; i < n; i++) {
        ans[i] = ans[i-1]+dif[i-1];
        sm = min(sm,ans[i]);
    }
    for(int i = 0; i < n; i++) {
        ans[i] = ans[i]-sm+1;
        if(ans[i] == 1) {
            p1 = i;
        }
        else if(ans[i] == n) {
            p2 = i;
        }
    }
    if(p1 > p2) {
        for(int i = 0; i < n; i++) {
            ans[i] = n-ans[i]+1;
        }
    }
    for(int i = 0; i < n; i++) {
        answer(i+1,ans[i]);
    }
}

Compilation message (stderr)

xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:31:5: warning: 'p2' may be used uninitialized in this function [-Wmaybe-uninitialized]
   31 |     if(p1 > p2) {
      |     ^~
xylophone.cpp:31:5: warning: 'p1' may be used uninitialized in this function [-Wmaybe-uninitialized]

• Subtask 1: 11 / 11
• Subtask 2: 36 / 36
• Subtask 3: 53 / 53