Submission #1535419

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Source Code Expand

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

const int mod = 1000*1000*1000+7;

int N;
vector<int> T;
vector<int> A;
vector<int> H;
vector<int> X;

int main() {
    scanf("%d", &N);
    T.resize(N);
    for(int i = 0; i < N; i++) {
        scanf("%d", &T[i]);
    }
    A.resize(N);
    for(int i = 0; i < N; i++) {
        scanf("%d", &A[i]);
    }
    H = vector<int>(N, -1);

    for(int i = 0; i < N; i++) {
        if(i == 0 || T[i - 1] != T[i]) H[i] = T[i];
    }
    for(int i = N - 1; i >= 0; i--) {
        if(i == N - 1 || A[i + 1] != A[i]) {
            if(H[i] != -1 && H[i] != A[i]) {
                printf("0");
                return 0;
            }
            H[i] = A[i];
        }
    }
    X = vector<int>(N, -1);
    int mx = -1;
    for(int i = 0; i < N; i++) {
        mx = max(mx, H[i]);
        if(mx != T[i]) {
            printf("0");
            return 0;
        }
        X[i] = mx;
    }
    mx = -1;
    for(int i = N - 1; i >= 0; i--) {
        mx = max(mx, H[i]);
        if(mx != A[i]) {
            printf("0");
            return 0;
        }
        X[i] = min(X[i], mx);
    }

    int ans = 1;
    for(int i = 0; i < N; i++) if(H[i] == -1) {
        ans = 1LL * ans * X[i] % mod;
    }
    cout << ans;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:13:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &N);
                    ^
./Main.cpp:16:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &T[i]);
                           ^
./Main.cpp:20:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &A[i]);
                           ^

Judge Result