Submission #1003507

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Source Code Expand

#include <algorithm>  
#include <iostream>  
#include <sstream>  
#include <string>  
#include <cstring>
#include <vector>  
#include <queue>  
#include <set>  
#include <map>  
#include <cstdio>  
#include <cstdlib>  
#include <cctype>  
#include <cmath>  
#include <list>  
#include <cassert>
#include <ctime>
#include <climits>
using namespace std;  

#define PB push_back  
#define MP make_pair  
#define SZ(v) ((int)(v).size())  
#define FOR(i,a,b) for(int i=(a);i<(b);++i)  
#define REP(i,n) FOR(i,0,n)  
#define FORE(i,a,b) for(int i=(a);i<=(b);++i)  
#define REPE(i,n) FORE(i,0,n)  
#define FORSZ(i,a,v) FOR(i,a,SZ(v))  
#define REPSZ(i,v) REP(i,SZ(v))  
typedef long long ll;
typedef unsigned long long ull;
ll gcd(ll a,ll b) { return b==0?a:gcd(b,a%b); }

const int MAXN=1000000;

char s[MAXN+1],t[MAXN+1]; int n;

int h[MAXN];
int z[MAXN],zoff,zmod; // for j in at..i, h[j]=z[j+zoff]+zmod


int solve() {
	int at=n;
	for(int i=n-1;i>=0;--i) {
		if(i<at) at=i,z[i+zoff]=-zmod;
		if(s[at]==t[i]) { h[i]=z[i+zoff]+zmod; continue; }
		while(at>=0&&s[at]!=t[i]) --at,z[at+zoff]=-zmod;
		if(at<0) return -1;
		h[i]=z[i+zoff]+zmod+1;
		++zmod,++zoff;
	}
	//REP(i,n) printf("%d ",h[i]); puts("");
	int ret=0; REP(i,n) if(h[i]>ret) ret=h[i]; return ret;
}

void run() {
	scanf("%d%s%s",&n,s,t); n=strlen(s);
	int ret=solve();
	printf("%d\n",ret);
}

int main() {
	run();
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘void run()’:
./Main.cpp:56:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%s%s",&n,s,t); n=strlen(s);
                        ^

Judge Result