Submission #1559160

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Source Code Expand

#include <iostream>
#include <algorithm>
#include <time.h>
#include <stack>
#include <string>
#include <cstring>
#include <cstdio>
#include <cmath>
#include <vector>
#include <queue>
#include <map>
#include <set>
#include <cassert>

using namespace std;

const int N = 100005;
const int inf = 1000 * 1000 * 1000;
const int mod = 1000 * 1000 * 1000 + 7;

int n,answ;
int a[N];

int main(){
    scanf("%d",&n);
    for(int i=1;i<=n;i++){
        scanf("%d",&a[i]);
    }
    for(int i=1;i<=n;i++){
        int st = i;
        while(st <= n && a[st] == st){
            st++;
        }
        int len = st - i;
        answ += len / 2 + len % 2;
        i = st;
    }
    cout<<answ<<endl;
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:25:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
                   ^
./Main.cpp:27:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&a[i]);
                          ^

Judge Result