답안 #152841

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
152841 2019-09-10T00:38:10 Z jhnah917 게임 (IOI13_game) C++14
컴파일 오류
0 ms 0 KB
#ifndef __GAME_H__
#define __GAME_H__
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <math.h>
#include <stdio.h>
#include <bits/stdc++.h>
using namespace std;
 
void init(int R, int C);
void update(int P, int Q, long long K);
long long calculate(int P, int Q, int U, int V);
int R, C;
 
long long f(long long X, long long Y) {
    long long tmp;
    while (X != Y && Y != 0) {
        tmp = X;
        X = Y;
        Y = tmp % Y;
    }
    return X;
}
 
typedef long long ll;

struct Seg1d{
	ll tree[8080];
	int bias;
	
	void init(int n){
		for(bias=1; bias<=n; bias <<= 1);
	}
	
	void update(int x, ll v){
		x |= bias; tree[x] = v;
		while(x >>= 1){
			tree[x] = f(tree[x << 1], tree[x << 1 | 1]);
		}
	}
	
	ll query(ll l, ll r){
		l |= bias, r |= bias;
		ll ret = 0;
		while(l <= r){
			if(l & 1) ret = f(ret, tree[l++]);
			if(~r & 1) ret = f(ret, tree[r--]);
			l >>= 1, r >>= 1;
		}
		return ret;
	}
};

struct Seg2d{
	Seg1d tree[8080];
	int bias;
	
	void init(int n, int m){
		for(bias=1; bias<=n; bias<<=1);
		for(int i=0; i<bias*2; i++) tree[i].init(m);
	}
	
	void update(int x, int y, ll v){
		x |= bias; tree[x].update(y, v);
		while(x >>= 1){
			ll t1 = tree[x << 1].query(y, y);
			ll t2 = tree[x << 1 | 1 ].query(y, y);
			tree[x].update(y, f(t1, t2));
		}
	}
	
	ll query(ll l, ll r, ll l1, ll r1){
		l |= bias, r |= bias;
		ll ret = 0;
		while(l <= r){
			if(l & 1) tree[l++].query(l1, r1);
			if(~r & 1) tree[r--].query(l1, r1);
			l >>=1 ,r >>= 1;
		}
		return ret;
	}
}tree;
 
void init(int r, int c) {
	R = r, C = c;
}
 
void update(int x, int y, long long val) {
	tree.update(x, y, val);
}
 
long long calculate(int x1, int y1, int x2, int y2) {
    return tree.query(x1, x2, y1, y2);
}
 
#ifdef __cplusplus
}
#endif
 
#endif /* __GAME_H__ */

Compilation message

grader.c: In function 'int main()':
grader.c:18:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
  int res;
      ^~~
In file included from /usr/include/c++/7/utility:69:0,
                 from /usr/include/c++/7/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:65,
                 from game.cpp:10:
/usr/include/c++/7/bits/stl_relops.h:85:5: error: template with C linkage
     template <class _Tp>
     ^~~~~~~~
/usr/include/c++/7/bits/stl_relops.h:98:5: error: template with C linkage
     template <class _Tp>
     ^~~~~~~~
/usr/include/c++/7/bits/stl_relops.h:111:5: error: template with C linkage
     template <class _Tp>
     ^~~~~~~~
/usr/include/c++/7/bits/stl_relops.h:124:5: error: template with C linkage
     template <class _Tp>
     ^~~~~~~~
In file included from /usr/include/c++/7/algorithm:60:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:65,
                 from game.cpp:10:
/usr/include/c++/7/utility:87:3: error: template with C linkage
   template<typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/utility:94:3: error: template with C linkage
   template<typename _Tp, typename = void>
   ^~~~~~~~
/usr/include/c++/7/utility:97:3: error: template with C linkage
   template<typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/utility:103:3: error: template with C linkage
   template<typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/utility:106:3: error: template with C linkage
   template<typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/utility:109:3: error: template with C linkage
   template<typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/utility:132:3: error: template with C linkage
   template<std::size_t __i, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/utility:136:3: error: template with C linkage
   template<std::size_t __i, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/utility:139:3: error: template with C linkage
   template<std::size_t __i, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/utility:145:3: error: template with C linkage
   template<std::size_t __i, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/utility:151:3: error: template with C linkage
   template<std::size_t __i, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/utility:160:3: error: template with C linkage
   template<std::size_t __i, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/utility:167:3: error: template with C linkage
   template<typename _T1, typename _T2>
   ^~~~~~~~
/usr/include/c++/7/utility:172:3: error: template with C linkage
   template<class _Tp1, class _Tp2>
   ^~~~~~~~
/usr/include/c++/7/utility:177:3: error: template with C linkage
   template<class _Tp1, class _Tp2>
   ^~~~~~~~
/usr/include/c++/7/utility:182:3: error: template with C linkage
   template<class _Tp1, class _Tp2>
   ^~~~~~~~
/usr/include/c++/7/utility:186:3: error: template with C linkage
   template<std::size_t _Int>
   ^~~~~~~~
/usr/include/c++/7/utility:189:3: error: template specialization with C linkage
   template<>
   ^~~~~~~~
/usr/include/c++/7/utility:208:3: error: template specialization with C linkage
   template<>
   ^~~~~~~~
/usr/include/c++/7/utility:227:3: error: template with C linkage
   template<std::size_t _Int, class _Tp1, class _Tp2>
   ^~~~~~~~
/usr/include/c++/7/utility:232:3: error: template with C linkage
   template<std::size_t _Int, class _Tp1, class _Tp2>
   ^~~~~~~~
/usr/include/c++/7/utility:237:3: error: template with C linkage
   template<std::size_t _Int, class _Tp1, class _Tp2>
   ^~~~~~~~
/usr/include/c++/7/utility:246:3: error: template with C linkage
   template <typename _Tp, typename _Up>
   ^~~~~~~~
/usr/include/c++/7/utility:251:3: error: template with C linkage
   template <typename _Tp, typename _Up>
   ^~~~~~~~
/usr/include/c++/7/utility:256:3: error: template with C linkage
   template <typename _Tp, typename _Up>
   ^~~~~~~~
/usr/include/c++/7/utility:261:3: error: template with C linkage
   template <typename _Tp, typename _Up>
   ^~~~~~~~
/usr/include/c++/7/utility:266:3: error: template with C linkage
   template <typename _Tp, typename _Up>
   ^~~~~~~~
/usr/include/c++/7/utility:271:3: error: template with C linkage
   template <typename _Tp, typename _Up>
   ^~~~~~~~
/usr/include/c++/7/utility:279:3: error: template with C linkage
   template <typename _Tp, typename _Up = _Tp>
   ^~~~~~~~
/usr/include/c++/7/utility:287:3: error: template with C linkage
   template<size_t... _Indexes> struct _Index_tuple { };
   ^~~~~~~~
/usr/include/c++/7/utility:290:3: error: template with C linkage
   template<typename _Itup1, typename _Itup2> struct _Itup_cat;
   ^~~~~~~~
/usr/include/c++/7/utility:292:3: error: template with C linkage
   template<size_t... _Ind1, size_t... _Ind2>
   ^~~~~~~~
/usr/include/c++/7/utility:299:3: error: template with C linkage
   template<size_t _Num>
   ^~~~~~~~
/usr/include/c++/7/utility:305:3: error: template specialization with C linkage
   template<>
   ^~~~~~~~
/usr/include/c++/7/utility:311:3: error: template specialization with C linkage
   template<>
   ^~~~~~~~
/usr/include/c++/7/utility:322:3: error: template with C linkage
   template<typename _Tp, _Tp... _Idx>
   ^~~~~~~~
/usr/include/c++/7/utility:329:3: error: template with C linkage
   template<typename _Tp, _Tp _Num,
   ^~~~~~~~
/usr/include/c++/7/utility:333:3: error: template with C linkage
   template<typename _Tp, _Tp _Num,  size_t... _Idx>
   ^~~~~~~~
/usr/include/c++/7/utility:343:3: error: template with C linkage
   template<typename _Tp, _Tp _Num>
   ^~~~~~~~
/usr/include/c++/7/utility:348:3: error: template with C linkage
   template<size_t... _Idx>
   ^~~~~~~~
/usr/include/c++/7/utility:352:3: error: template with C linkage
   template<size_t _Num>
   ^~~~~~~~
/usr/include/c++/7/utility:356:3: error: template with C linkage
   template<typename... _Types>
   ^~~~~~~~
In file included from /usr/include/c++/7/bits/stl_algo.h:60:0,
                 from /usr/include/c++/7/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:65,
                 from game.cpp:10:
/usr/include/c++/7/bits/algorithmfwd.h:195:3: error: template with C linkage
   template<typename _IIter, typename _Predicate>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:199:3: error: template with C linkage
   template<typename _IIter, typename _Predicate>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:204:3: error: template with C linkage
   template<typename _FIter, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:208:3: error: template with C linkage
   template<typename _FIter, typename _Tp, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:224:3: error: template with C linkage
   template<typename _IIter, typename _OIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:228:3: error: template with C linkage
   template<typename _BIter1, typename _BIter2>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:233:3: error: template with C linkage
   template<typename _IIter, typename _OIter, typename _Predicate>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:237:3: error: template with C linkage
   template<typename _IIter, typename _Size, typename _OIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:245:3: error: template with C linkage
   template<typename _FIter, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:249:3: error: template with C linkage
   template<typename _FIter, typename _Tp, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:253:3: error: template with C linkage
   template<typename _FIter, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:257:3: error: template with C linkage
   template<typename _OIter, typename _Size, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:263:3: error: template with C linkage
   template<typename _FIter1, typename _FIter2>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:267:3: error: template with C linkage
   template<typename _FIter1, typename _FIter2, typename _BinaryPredicate>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:275:3: error: template with C linkage
   template<typename _IIter, typename _Predicate>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:284:3: error: template with C linkage
   template<typename _IIter1, typename _IIter2>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:288:3: error: template with C linkage
   template<typename _IIter1, typename _IIter2, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:292:3: error: template with C linkage
   template<typename _BIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:296:3: error: template with C linkage
   template<typename _BIter, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:301:3: error: template with C linkage
   template<typename _RAIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:305:3: error: template with C linkage
   template<typename _RAIter, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:309:3: error: template with C linkage
   template<typename _RAIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:313:3: error: template with C linkage
   template<typename _RAIter, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:317:3: error: template with C linkage
   template<typename _IIter, typename _Predicate>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:321:3: error: template with C linkage
   template<typename _FIter1, typename _FIter2>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:325:3: error: template with C linkage
   template<typename _FIter1, typename _FIter2,
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:330:3: error: template with C linkage
   template<typename _FIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:334:3: error: template with C linkage
   template<typename _FIter, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:338:3: error: template with C linkage
   template<typename _FIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:342:3: error: template with C linkage
   template<typename _FIter, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:347:3: error: template with C linkage
   template<typename _FIter1, typename _FIter2>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:351:3: error: template with C linkage
   template<typename _FIter, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:355:3: error: template with C linkage
   template<typename _FIter, typename _Tp, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:359:3: error: template with C linkage
   template<typename _RAIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:363:3: error: template with C linkage
   template<typename _RAIter, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:367:3: error: template with C linkage
   template<typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:372:3: error: template with C linkage
   template<typename _Tp, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:380:3: error: template with C linkage
   template<typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:385:3: error: template with C linkage
   template<typename _Tp, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:393:3: error: template with C linkage
   template<typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:398:3: error: template with C linkage
   template<typename _Tp, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:403:3: error: template with C linkage
   template<typename _FIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:408:3: error: template with C linkage
   template<typename _FIter, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:413:3: error: template with C linkage
   template<typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:418:3: error: template with C linkage
   template<typename _Tp, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:423:3: error: template with C linkage
   template<typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:428:3: error: template with C linkage
   template<typename _Tp, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:433:3: error: template with C linkage
   template<typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:438:3: error: template with C linkage
   template<typename _Tp, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:446:3: error: template with C linkage
   template<typename _BIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:450:3: error: template with C linkage
   template<typename _BIter, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:455:3: error: template with C linkage
   template<typename _IIter, typename _Predicate>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:463:3: error: template with C linkage
   template<typename _IIter, typename _RAIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:467:3: error: template with C linkage
   template<typename _IIter, typename _RAIter, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:474:3: error: template with C linkage
   template<typename _IIter, typename _OIter1,
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:479:3: error: template with C linkage
   template<typename _FIter, typename _Predicate>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:484:3: error: template with C linkage
   template<typename _RAIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:488:3: error: template with C linkage
   template<typename _RAIter, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:492:3: error: template with C linkage
   template<typename _BIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:496:3: error: template with C linkage
   template<typename _BIter, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:500:3: error: template with C linkage
   template<typename _RAIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:504:3: error: template with C linkage
   template<typename _RAIter, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:510:3: error: template with C linkage
   template<typename _FIter, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:514:3: error: template with C linkage
   template<typename _FIter, typename _Predicate>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:518:3: error: template with C linkage
   template<typename _IIter, typename _OIter, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:522:3: error: template with C linkage
   template<typename _IIter, typename _OIter, typename _Predicate>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:528:3: error: template with C linkage
   template<typename _IIter, typename _OIter, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:532:3: error: template with C linkage
   template<typename _Iter, typename _OIter, typename _Predicate, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:538:3: error: template with C linkage
   template<typename _BIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:542:3: error: template with C linkage
   template<typename _BIter, typename _OIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:548:5: error: template with C linkage
     template<typename _FIter>
     ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:553:3: error: template with C linkage
   template<typename _FIter, typename _OIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:565:3: error: template with C linkage
   template<typename _RAIter, typename _UGenerator>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:570:3: error: template with C linkage
   template<typename _RAIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:574:3: error: template with C linkage
   template<typename _RAIter, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:578:3: error: template with C linkage
   template<typename _BIter, typename _Predicate>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:594:3: error: template with C linkage
   template<typename _FIter1, typename _FIter2>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:600:3: error: template with C linkage
   template<typename _FIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:604:3: error: template with C linkage
   template<typename _FIter, typename _BinaryPredicate>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:610:3: error: template with C linkage
   template<typename _FIter, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:614:3: error: template with C linkage
   template<typename _FIter, typename _Tp, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:622:3: error: template with C linkage
   template<typename _FIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:626:3: error: template with C linkage
   template<typename _FIter, typename _BinaryPredicate>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:630:3: error: template with C linkage
   template<typename _IIter, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:634:3: error: template with C linkage
   template<typename _IIter, typename _Predicate>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:638:3: error: template with C linkage
   template<typename _IIter1, typename _IIter2>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:642:3: error: template with C linkage
   template<typename _IIter1, typename _IIter2, typename _BinaryPredicate>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:646:3: error: template with C linkage
   template<typename _IIter, typename _Tp>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:650:3: error: template with C linkage
   template<typename _FIter1, typename _FIter2>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:654:3: error: template with C linkage
   template<typename _FIter1, typename _FIter2, typename _BinaryPredicate>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:658:3: error: template with C linkage
   template<typename _IIter, typename _Predicate>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:662:3: error: template with C linkage
   template<typename _IIter, typename _Funct>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:666:3: error: template with C linkage
   template<typename _FIter, typename _Generator>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:670:3: error: template with C linkage
   template<typename _OIter, typename _Size, typename _Generator>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:674:3: error: template with C linkage
   template<typename _IIter1, typename _IIter2>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:678:3: error: template with C linkage
   template<typename _IIter1, typename _IIter2, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:682:3: error: template with C linkage
   template<typename _FIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:687:3: error: template with C linkage
   template<typename _FIter, typename _Compare>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:692:3: error: template with C linkage
   template<typename _IIter1, typename _IIter2, typename _OIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:696:3: error: template with C linkage
   template<typename _IIter1, typename _IIter2, typename _OIter,
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:701:3: error: template with C linkage
   template<typename _FIter>
   ^~~~~~~~
/usr/include/c++/7/bits/algorithmfwd.h:706:3: error: template