Submission #2535474

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Source Code Expand

#include <cstdio>
#include <iostream>
#include <algorithm>
#include <vector>
#include <set>
#include <list>
#include <map>
#include <string>
#include <cstring>
#include <stack>
#include <queue>
#include <cmath>
#include <ctime>
#include <bitset>
#include <utility>
#include <complex>
#include <assert.h>
#include <limits.h>
#include <iomanip>
#include <unordered_map>
//#include <bits/stdc++.h>
using namespace std;
#define rank rankk
#define mp make_pair
#define pb push_back
#define xo(a,b) ((b)&1?(a):0)
#define tm tmp

//#define LL ll
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef long long ll;
typedef pair<ll,int> pli;
typedef pair<int,ll>pil;
typedef pair<ll,ll> pll;
//const double INF=1e20;
const int INF=0x3f3f3f3f;
//const int INF= 0x7fffffff;
//const ll INF=0x3f3f3f3f3f3f3f3fll;
const ll INFF=0x3f3f3f3f3f3f3f3fll;
//const ll INFF=1e14+5;
const int MAX=2e5+5;
//const ll MAXN=2e8;
//const int MAX_N=MAX;
const int MOD=1e9+7;
//const ull MOD=1e7+7;
//const ll MOD=998244353;
//const long double pi=acos(-1.0);
//const double eps=0.00000001;
ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}
template<typename T>inline T abs(T a) {return a>0?a:-a;}
//#define double long double
template<class T> inline
void read(T& num) {
    bool start=false,neg=false;
    char c;
    num=0;
    while((c=getchar())!=EOF) {
        if(c=='-') start=neg=true;
        else if(c>='0' && c<='9') {
            start=true;
            num=num*10+c-'0';
        } else if(start) break;
    }
    if(neg) num=-num;
}
inline ll powMM(ll a,ll b,ll M){
    ll ret=1;
    a%=M;
//    b%=M;
    while (b){
        if (b&1) ret=ret*a%M;
        b>>=1;
        a=a*a%M;
    }
    return ret;
}
//const long double eps=-1.0;
//clock_t t1 = clock();
//fprintf(stderr, "%ld ms\n", clock() - t1);
void open()
{
    freopen("input.txt","r",stdin);
    freopen("output.txt","w",stdout);
}

int n;
int a[MAX];
ll an;
map<int,int>re;
int main()
{
    scanf("%d",&n);
    for(int i=1;i<=n;i++)
        scanf("%d",&a[i]);
    if(a[1])return 0*printf("-1\n");
    for(int i=2;i<=n;i++)
        if(a[i]>a[i-1]+1)return 0*printf("-1\n");
    int cnt=-1;
    for(int i=2;i<=n;i++)
    {
        if(re[a[i]+cnt])
        {
            an+=i-re[a[i]+cnt];

        }
        else an+=a[i];
        re[a[i]+cnt]=i;
        --cnt;
    }
    printf("%lld\n",an);


}
/*

*/

Submission Info

Compile Error

./Main.cpp: In function ‘void open()’:
./Main.cpp:83:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]
     freopen("input.txt","r",stdin);
                                   ^
./Main.cpp:84:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]
     freopen("output.txt","w",stdout);
                                     ^
./Main.cpp: In function ‘int main()’:
./Main.cpp:93:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
                   ^
./Main.cpp:95:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&a[i]);
                          ^

Judge Result